CN108089224B

CN108089224B - A kind of X-ray focus detection method, device and equipment

Info

Publication number: CN108089224B
Application number: CN201611042507.9A
Authority: CN
Inventors: 蒋哲文
Original assignee: Beijing Neusoft Medical Equipment Co Ltd
Current assignee: Beijing Neusoft Medical Equipment Co Ltd
Priority date: 2016-11-23
Filing date: 2016-11-23
Publication date: 2019-08-13
Anticipated expiration: 2036-11-23
Also published as: CN108089224A

Abstract

The embodiment of the invention discloses a kind of X-ray focus detection method, device and equipment, realize the detection whether to shift to the effective focal spot of X-ray bulb.Wherein, which comprises execute the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb, and according to preset rules, the first parameter is obtained according to the first energy value for presetting channel output in the X-ray detector；The second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed, and according to the preset rules, the second parameter is obtained according to the second energy value for presetting channel output in the X-ray detector；If first parameter and second parameter mismatch, confirm that the actually active focus shifts relative to the ideal effective focal spot.

Description

A kind of X-ray focus detection method, device and equipment

Technical field

The present invention relates to X-ray bulb field more particularly to a kind of X-ray focus detection method, device and Equipment.

Background technique

X-ray bulb is the vacuum diode of work under high voltages.Comprising there are two electrodes: one is for emitting electricity The filament of son, as cathode, the other is the target for receiving electron bombardment, as anode.X-ray bulb power pack is extremely It less include the high voltage power supply that the low-tension supply for making filament heating and one apply high voltage to the two poles of the earth.When filament passes through foot Enough electric currents make it generate electron cloud, and have enough voltage (kilovolt grade) to be added between anode and cathode, so that electron cloud quilt It is pull towards anode.Electronics hits anode target with the state of high energy and high speed at this time, and high-velocity electrons reach target surface, and movement is hindered suddenly Only, the sub-fraction of kinetic energy is just converted into radiation energy, forms X-ray.

X-ray bulb can be divided into fixed anode pipe and rotating-anode tube, and so-called fixed anode pipe refers to X-ray bulb In anode target be during the work time stationary state；So-called rotating-anode tube refers to that the anode target in X ray tube is working It is in the process high speed rotation state.Since electronics high-speed impact can generate higher heat on the anode target of rotation, for rotation For turning anode tube, the generation of heat is dispersed by the rotation of anode target, and outside radiations heat energy in real time, reaches stronger heat dissipation Property purpose, so ratio of heat capacities fixed anode pipe is high, thus the application of rotating-anode tube is more more universal than fixed anode pipe.

Referring to Fig. 1, which is the structural schematic diagram of rotating-anode tube.In the figure, rotating-anode tube includes cathode and sun Pole, wherein cathode includes spiral shell shape filament, and anode is rotatable anode target, and rotating-anode tube further includes driving anode target rotation Rotor.Referring to fig. 2, which is the actual focal spot and effective focal spot schematic diagram of rotating-anode tube.In the figure, the filament of cathode The high-velocity electrons of generation are beaten on the anode target of anode, and actual focal spot, projection of the actual focal spot in X-axis are formed on anode target Referred to as effective focal spot.Wherein, in the corresponding coordinate system of X-axis, Z axis is into bed direction, and the plane that X-axis and Y-axis are formed is vertical In the plane of Z axis, X-axis is horizontal direction, and Y-axis is vertical direction.

Revolving speed is usually higher at work for anode target, such as 6000 revolutions per seconds, and some is even more than 10000 revolutions per seconds.In sun During pole target rotates, since anode target rotary shaft actual installation position deviates or anode target with ideal mounting position Weight itself it is uneven situations such as, may cause anode target and swing while rotating.And the swing meeting of anode target Lead to the offset of actual focal spot, and the offset of actual focal spot causes effective focal spot to shift in the Z-axis direction.Due to CT The position of the image reconstruction process based on effective focal spot of (Computed Tomography, CT scan), if having Effect focus shifts, and the result that will lead to image reconstruction generates error, influences picture quality.Therefore, effective coke is detected It is very crucial whether point shifts.

Summary of the invention

In order to solve technical problem of the existing technology, the present invention provides a kind of X-ray focus detection side Method, device and equipment realize the detection whether to shift to the effective focal spot of X-ray bulb.

The embodiment of the invention provides a kind of X-ray focus detection methods, which comprises

The first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb is executed, and according to preset rules, The first parameter is obtained according to the first energy value for presetting channel output in the X-ray detector；

The second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed, and according to described pre- If regular, the second parameter is obtained according to the second energy value for presetting channel output in the X-ray detector；

If first parameter and second parameter mismatch, confirm the actually active focus relative to the reason Think that effective focal spot shifts.

Preferably, described according to preset rules, according to the first energy value for presetting channel output in the X-ray detector Obtaining the first parameter includes:

Confirm the first row channel set that available energy magnitude is exported in X-ray detector, and by the first row channel set Conjunction is divided into first row channel subclass and second row channel subclass, wherein first row channel subclass includes described One end row channel, default row channel in the set of one row channel and between all row channels, second row channel subset Conjunction includes remaining row channel in addition to the subclass of the first row channel；

It is obtained according to the total energy value of the total energy value of first row channel subclass and second row channel subclass To first parameter, the total energy value of first row channel subclass is respectively to arrange channel in the subclass of the first row channel The sum of corresponding energy value, the total energy value of second row channel subclass are each in the subclass of the second row channel Arrange the sum of corresponding energy value in channel；

It is described according to the preset rules, obtained according to the second energy value for presetting channel output in the X-ray detector Include: to the second parameter

Confirm the second row channel set for exporting available energy magnitude in the X-ray detector, and the second row is led to Road set is divided into third row's channel subclass and the 4th row channel subclass, wherein third row's channel subclass includes institute State second row channel set in one end row channel, the default row channel and between all row channels, the 4th row Channel subclass includes remaining row channel in addition to the third arranges channel subclass；

It is obtained according to the total energy value of the total energy value of third row's channel subclass and the 4th row channel subclass To second parameter, the total energy value of the third row channel subclass is respectively to arrange channel in third row's channel subclass The sum of corresponding energy value, the total energy value of the 4th row channel subclass are each in the subclass of the 4th row channel Arrange the sum of corresponding energy value in channel.

Preferably, the method also includes:

The mapping relations of energy ratio and distance than between are obtained in advance；

It is described according to the total energy value of first row channel subclass and the gross energy of second row channel subclass Value obtains the first parameter

Obtain the first energy ratio, first energy ratio is the total energy value and described the of first row channel subclass Ratio between the total energy value of two row channel subclass；

First distance ratio is obtained according to the mapping relations and first energy ratio, the first distance ratio is first The ratio of distance and second distance, the first distance be predeterminated position perpendicular to first edge line distance, described second away from From for the predeterminated position perpendicular to second edge line with a distance from, the predeterminated position is corresponding with the default row channel, described First edge line and the second edge line is by the x-ray bombardments of the ideal effective focal spot generation to the X-ray detection Edge line on device, in two row's channel directions of generation, wherein the first edge line and first row channel subclass In the side of the predeterminated position, the second edge line is with second row channel subclass in the another of the predeterminated position Side；

It is obtained according to the total energy value of the total energy value of third row's channel subclass and the 4th row channel subclass Include: to second parameter

Obtain the second energy ratio, second energy ratio is the total energy value and described that the third arranges channel subclass Ratio between the total energy value of four row channel subclass；

Second distance ratio is obtained according to the mapping relations and second energy ratio, the second distance ratio is third The ratio of distance and the 4th distance, third distance are distance of the predeterminated position perpendicular to third edge line, the described 4th away from From for the predeterminated position perpendicular to the 4th edge line with a distance from, the predeterminated position is corresponding with the default row channel, described Third edge line and the 4th edge line is by the x-ray bombardments of the actually active focus generation to the X-ray detection Edge line on device, in two row's channel directions of generation, wherein the third edge line and the third arrange channel subclass In the side of the predeterminated position, the 4th edge line is with the 4th row channel subclass in the another of the predeterminated position Side；

If first parameter and second parameter mismatch include:

If the first distance ratio and second distance ratio be not identical.

Preferably, the method also includes:

According to the first distance than, the second distance than, the opening width of collimator, the actually active focus or Vertical range and the actually active focus or described ideal effective between the ideal effective focal spot and the collimator Vertical range between focus and the X-ray detector, obtain the actually active focus and the ideal effective focal spot it Between offset distance.

Preferably, the column channel of same range corresponding with the second row channel set is gathered in the first row channel.

The embodiment of the invention provides a kind of X-ray focus detection device, described device includes: the first scanning Unit, the first parameter acquiring unit, the second scanning element, the second parameter acquiring unit and confirmation unit；

Wherein, first scanning element, for executing the X-ray for using the ideal effective focal spot of X-ray bulb to generate First scanning；

First parameter acquiring unit is used for according to preset rules, defeated according to channel is preset in the X-ray detector The first energy value out obtains the first parameter；

Second scanning element, the X-ray that the actually active focus for executing using the X-ray bulb generates Second scanning；

Second parameter acquiring unit, for leading to according to being preset in the X-ray detector according to the preset rules Second energy value of road output obtains the second parameter；

The confirmation unit, if mismatching for first parameter and second parameter, confirming described actually has Effect focus shifts relative to the ideal effective focal spot.

Preferably, first parameter acquiring unit includes: first row channel set confirmation unit and the confirmation of the first parameter Unit；

Confirmation unit is gathered in the first row channel, and the first of available energy magnitude is exported in X-ray detector for confirming Channel set is arranged, and first row channel set is divided into first row channel subclass and second row channel subclass, Described in first row channel subclass include one end row channel in the set of the first row channel, default row channel and between All row channels, second row channel subclass include in addition to the subclass of the first row channel remaining row channel；

The first parameter confirmation unit, for according to the total energy value of first row channel subclass and described second The total energy value of row's channel subclass obtains first parameter, and the total energy value of first row channel subclass is described the The sum of corresponding energy value in channel is respectively arranged in one row channel subclass, the total energy value of second row channel subclass is The sum of corresponding energy value in channel is respectively arranged in the subclass of the second row channel；

Second parameter acquiring unit includes: second row channel set confirmation unit and the second parameter confirmation unit；

Confirmation unit is gathered in the second row channel, and available energy magnitude is exported in the X-ray detector for confirming Second row channel set, and second row channel set is divided into third row's channel subclass and the 4th row channel subset It closes, wherein it includes that channel is arranged in one end in the second row channel set, the default row is led to that the third, which arranges channel subclass, Road and between all row channels, the 4th row channel subclass include except the third arrange channel subclass in addition to Remaining row channel；

The second parameter confirmation unit, for arranging the total energy value and the described 4th of channel subclass according to the third The total energy value of row's channel subclass obtains second parameter, and the total energy value of the third row channel subclass is described the The sum of corresponding energy value in channel is respectively arranged in three row channel subclass, the total energy value of the 4th row channel subclass is The sum of corresponding energy value in channel is respectively arranged in the subclass of the 4th row channel.

Preferably, described device further include:

Mapping relations acquiring unit, for obtaining the mapping relations of energy ratio and distance than between in advance；

The first parameter confirmation unit includes: that the first energy ratio acquiring unit and first distance compare acquiring unit；

The first energy ratio acquiring unit, for obtaining the first energy ratio, first energy ratio is the first row Ratio between the total energy value of channel subclass and the total energy value of second row channel subclass；

The first distance is than acquiring unit, for obtaining first according to the mapping relations and first energy ratio Distance than, the first distance than the ratio for first distance and second distance, the first distance be predeterminated position perpendicular to The distance of first edge line, the second distance are distance of the predeterminated position perpendicular to second edge line, the default position Set corresponding with the default row channel, the first edge line and the second edge line are to be generated by the ideal effective focal spot X-ray bombardment to the X-ray detector on, the edge lines in two of generation row's channel directions, wherein first side Edge line and first row channel subclass are in the side of the predeterminated position, the second edge line and the second row channel Subclass is in the other side of the predeterminated position；

The second parameter confirmation unit includes: that the second energy ratio acquiring unit and second distance compare acquiring unit；

The second energy ratio acquiring unit, for obtaining the second energy ratio, second energy ratio is third row Ratio between the total energy value of channel subclass and the total energy value of the 4th row channel subclass；

The second distance is than acquiring unit, for obtaining second according to the mapping relations and second energy ratio Distance than, the second distance than the ratio for third distance and the 4th distance, the third distance be predeterminated position perpendicular to The distance of third edge line, the 4th distance is distance of the predeterminated position perpendicular to the 4th edge line, the default position Set corresponding with the default row channel, the third edge line and the 4th edge line are to be generated by the actually active focus X-ray bombardment to the X-ray detector on, the edge lines in two of generation row's channel directions, wherein the third side Edge line and third row's channel subclass are in the side of the predeterminated position, the 4th edge line and the 4th row channel Subclass is in the other side of the predeterminated position；

The confirmation unit confirms institute if not identical specifically for the first distance ratio and second distance ratio Actually active focus is stated to shift relative to the ideal effective focal spot.

Preferably, described device further include:

Offset distance acquiring unit, for wider than, the opening of collimator than, the second distance according to the first distance Vertical range and the reality between degree, the actually active focus or the ideal effective focal spot and the collimator Vertical range between effective focal spot or the ideal effective focal spot and the X-ray detector, obtains the actually active coke Offset distance between point and the ideal effective focal spot.

The embodiment of the invention also provides a kind of X-ray focus detection device, the equipment includes: processing Device, memory and display for storing the processor-executable instruction；

Wherein, the processor is configured to:

The display is shown described actually active if mismatching for first parameter and second parameter The result that focus shifts relative to the ideal effective focal spot.

The present invention executes the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb, and according to default Rule obtains the first parameter according to the first energy value for presetting channel output in X-ray detector；It executes and uses the X-ray Second scanning of the X-ray that the actually active focus of bulb generates, and according to the preset rules, it is defeated according to the default channel The second energy value out obtains the second parameter.If first parameter and second parameter mismatch, the reality is confirmed Effective focal spot shifts relative to the ideal effective focal spot；If first parameter and second parameter matching, really Recognize the actually active focus to be overlapped with the ideal effective focal spot, i.e., there is no offsets, to realize to X-ray bulb The detection that whether shifts of ideal effective focal spot.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the structural schematic diagram of rotating-anode tube；

Fig. 2 is the actual focal spot and effective focal spot schematic diagram of rotating-anode tube；

Fig. 3 is a kind of flow chart for X-ray focus detection method that the embodiment of the present invention one provides；

Fig. 4 is a kind of flow chart of X-ray focus detection method provided by Embodiment 2 of the present invention；

Fig. 5 is first row channel assembly diagram in the embodiment of the present invention two；

Fig. 6 is the schematic diagram that X-ray bulb focus shifts in the embodiment of the present invention three；

Fig. 7 is the schematic diagram of collimator in the embodiment of the present invention three；

Fig. 8 is a kind of flow chart for X-ray focus detection method that the embodiment of the present invention three provides；

Fig. 9 is the energy diagram that different row's channel receptions of X-ray detector in the embodiment of the present invention three arrive；

Figure 10 is a kind of flow chart for X-ray focus detection method that the embodiment of the present invention four provides；

Figure 11 is a kind of structural block diagram for X-ray focus detection device that the embodiment of the present invention five provides；

Figure 12 is a kind of hardware architecture diagram for X-ray focus detection device that the embodiment of the present invention five provides.

Specific embodiment

In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.

Embodiment one:

Referring to Fig. 3, which is a kind of process for X-ray focus detection method that the embodiment of the present invention one provides Figure.

X-ray focus detection method provided in this embodiment includes the following steps:

Step S101: execute the X-ray generated using the ideal effective focal spot of X-ray bulb first is scanned, and according to Preset rules obtain the first parameter according to the first energy value for presetting channel output in the X-ray detector.

In the present embodiment, the ideal effective focal spot refers to the effective focal spot not shifted, under normal circumstances, works as institute It states X-ray bulb to install when use for the first time, the anode target at or initial stage begun to use every time, X-ray bulb is logical It does not often swing, the effective focal spot generated this when is usually that there is no the effective focal spots of offset, that is, ideal to have Imitate focus.After beginning to use a period of time, especially with the time it is longer when, anode target is just likely to swing, Once anode target is swung, the ideal effective focal spot just shifts, and becomes actually active focus.

When ideal effective focal spot there are when, open the opening of collimator, execute the first scanning, so that ideal effectively burnt The X-ray that point generates passes through the opening of collimator, by each channel reception of X-ray detector.X-ray detector (Detector) be in CT equipment receive X-ray equipment, the electric signal that it can be converted to X-ray energy for record, And the energy value of each channel output is got according to the electric signal.

In the channel of all output energy values, select part or all as default channel.So-called channel refers to defeated The basic unit of energy signal out.It should be noted that the meaning of the detector cells of channel and X-ray detector not phase Together.One channel can correspond to a detector cells, can also correspond to multiple detector cells.

The default channel can be a channel, be also possible to multiple channels, the present invention is not specifically limited.

Step S102: executing the second scanning of the X-ray generated using the actually active focus of the X-ray bulb, and According to the preset rules, the second parameter is obtained according to the second energy value for presetting channel output in the X-ray detector.

When the X-ray bulb after a period of work, it is described ideal effective focal spot may deviate as actually active coke Point executes the second scanning under the collimator opening of same widths, and second scanning is to be generated by the actually active focus X-ray scanning, and obtain the second energy value of the default channel output.

Because once the ideal effective focal spot offset is actually active focus, each channel in the X-ray detector More or less variation can occur for the energy value of output.This is because the X-ray that the effective focal spot generates not is parallel , in the x-ray bombardment to X-ray detector generated by effective focal spot, the energy that all channel receptions arrive is not all identical, Present the channel reception at X-ray radiation center to energy is higher, energy that the channel reception at X-ray radiation edge arrives is lower Phenomenon.

Thus, if the ideal effective focal spot offset, the first of the default channel output is scanned according to execution first The first parameter that energy value obtains, and second that the second energy value that the default channel exports obtains is scanned according to execution second Parameter must be it is different, it is unmatched in other words.Around this principle, if judging first parameter and described second Parameter mismatches, then it is assumed that the actually active focus is deviated relative to the ideal effective focal spot.

It should be noted that because the energy for the X-ray that the X-ray detector receives is related with scanning circumstance 's.For example, in the case where not considering the offset of ideal effective focal spot, if sweep object is different, even or the same scanning pair As the position in the first scanning and the second scanning on scanning bed is different, and the energy value that the same channel exports has very greatly A possibility that be different.Therefore, in order to guarantee that first parameter and second parameter are comparable, need to guarantee The scanning circumstance of one scanning and the scanning circumstance of the second scanning are identical.

In addition, the present invention is not defined the preset rules, those skilled in the art can as the case may be into Row design.It should be noted that the preset rules can be first parameter equal to the first energy value, second parameter Equal to the second energy value.

Step S103: if first parameter and second parameter mismatch, confirm the actually active focus phase It shifts for the ideal effective focal spot.

The present embodiment executes the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb, and according to pre- If regular, the first parameter is obtained according to the first energy value for presetting channel output in X-ray detector；It executes and is penetrated using the X Second scanning of the X-ray that the actually active focus of ray tube generates, and according to the preset rules, according to the default channel Second energy value of output obtains the second parameter.If first parameter and second parameter mismatch, the reality is confirmed Border effective focal spot shifts relative to the ideal effective focal spot；If first parameter and second parameter matching, Confirm that the actually active focus is overlapped with the ideal effective focal spot, i.e., there is no offsets, to realize to X-ray ball The detection whether ideal effective focal spot of pipe shifts.

Embodiment two

One of preset rules of first parameter and second parameter calculated above are discussed in detail in the present embodiment.

Referring to fig. 4, which is a kind of process of X-ray focus detection method provided by Embodiment 2 of the present invention Figure.

Step S201: the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb is executed.

Step S202: the first row channel set of available energy magnitude is exported in confirmation X-ray detector, and by described first Row channel set is divided into first row channel subclass and second row channel subclass.

It is not that every row channel of X-ray detector can receive X-ray because the opening of collimator is limited, that In the present embodiment, it is possible to which the energy value for receiving the channel output of X-ray is available energy magnitude, penetrated without receiving X The energy value of the channel output of line is known as invalid energy value.Under normal conditions, the signal of the channel output of X-ray can be received Amplitude is not 0, is available energy magnitude according to the energy value that the signal obtains, and does not receive the letter of the channel output of X-ray Number amplitude is 0, is invalid energy value according to the energy value that the signal obtains.In a row channel, as long as there is a channel defeated Energy value out is available energy magnitude, which just belongs to first row channel set.

When X-ray is generated by ideal effective focal spot, the first row that available energy magnitude is exported in X-ray detector is confirmed Channel set, and first row channel set is divided into first row channel subclass and second row channel subclass.Wherein, First row channel subclass include one end row channel in the set of the first row channel, default row channel and between All row channels, second row channel subclass include remaining row channel in addition to the subclass of the first row channel.

Referring to Fig. 5, which is first row channel assembly diagram.In the figure, 14 row channels are shared, wherein 4-11 The energy value for arranging channel output is available energy magnitude, i.e. 4-11 row is first row channel subclass.Assuming that default channel is the 7th Channel is arranged, then first row channel subclass can be the 4th row channel to the 7th row channel, remaining row channel, i.e. the 8th row channel Belong to second row channel subclass to the 11st row channel.

It should be noted that first row channel set may include all column channels, it also may include part column channel, institute Stating part column channel can be a column channel.For example, with reference to Fig. 5, one shares 44 column channels, the first row channel set in the figure Conjunction may include the 5th to the 33rd arranging channel from left to right, can also only include the 20th column, can also include all column channels.In order to make The value of subsequent first parameter calculates more accurate, the preferred first row channel set of the present embodiment include centered on central array and Symmetrical several columns channel, such as the 10th column to the 35th column.

Step S203: according to the total of the total energy value of first row channel subclass and second row channel subclass Energy value obtains first parameter.

The total energy value of first row channel subclass is right respectively respectively to arrange channel in the subclass of the first row channel The sum of energy value answered.

The total energy value of second row channel subclass is right respectively respectively to arrange channel in the subclass of the second row channel The sum of energy value answered.

The corresponding energy value in so-called each row channel is related to the columns that the first row channel is gathered, if described first Row channel set has default column, and described preset is classified as multiple row, then the corresponding energy value in every row channel can be the row and preset multiple row The mean value of the energy value of channel output.

How the present invention is to according to the total energy value and second row channel subset of first row channel subclass The method that the total energy value of conjunction obtains first parameter is defined, and those skilled in the art can be with designed, designed.For example, institute State the first parameter be first row channel subclass total energy value and second row channel subclass total energy value it Between ratio.Alternatively, total energy value and first row channel set that first parameter is first row channel subclass are always Energy value (total energy value of first row channel subclass and the sum of the total energy value of second row channel subclass) it Between ratio.

Step S204: the second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed.

Step S205: confirm the second row channel set that available energy magnitude is exported in the X-ray detector, and will be described Second row channel set is divided into third row's channel subclass and the 4th row channel subclass.

When X-ray is generated by actually active focus, the second row that available energy magnitude is exported in X-ray detector is confirmed Channel set confirms that the mode of the second row channel set is identical with the mode of confirmation first row channel set, herein no longer It repeats.And second row channel set is divided into third row's channel subclass and the 4th row channel subclass.It is wherein described Third row's channel subclass include one end row channel in the set of the second row channel, the default row channel and between All row channels, the 4th row channel subclass include remaining row channel in addition to the third arranges channel subclass.

It should be noted that the second row channel set has the column of same range logical with first row channel set Road.

Step S206: according to the third arrange channel subclass total energy value and the 4th row channel subclass it is total Energy value obtains second parameter.

The total energy value of the third row channel subclass is right respectively respectively to arrange channel in third row's channel subclass The sum of energy value answered, the total energy value of the 4th row channel subclass are respectively to arrange channel in the subclass of the 4th row channel The sum of corresponding energy value.

The corresponding energy value in so-called each row channel is related to the columns that the second row channel is gathered, if described second Row channel set has default column, and described preset is classified as multiple row, then it is each to can be the default column of the row for the corresponding energy value in every row channel The mean value of the energy value of channel output.

The present invention not to how according to the third arrange channel subclass total energy value and the 4th row channel subset The method that the total energy value of conjunction obtains second parameter is defined, and those skilled in the art can be with designed, designed.For example, institute State the second parameter be the third arrange channel subclass total energy value and the 4th row channel subclass total energy value it Between ratio.Alternatively, second parameter is that the third arranges the total energy value of channel subclass and the 4th row channel is gathered always Energy value (total energy value of third row's channel subclass and the sum of the total energy value of the 4th row channel subclass) it Between ratio.

It must be identical no matter how first parameter and second parameter determine that they establish rules really , i.e., it is determined according to identical preset rules.For example, if the first parameter is the gross energy of first row channel subclass Ratio between value and the total energy value of second row channel subclass, then the second parameter should be third row channel Ratio between the total energy value of subclass and the total energy value of the 4th row channel subclass.

Step S207: if first parameter and second parameter mismatch, confirm the actually active focus phase It shifts for the ideal effective focal spot.

In the present embodiment, when finding that first parameter and second parameter mismatch, it may be considered that described Ideal effective focal spot offset is the actually active focus.

Embodiment three

Before introducing the preset rules, X-ray focus inspection provided in this embodiment is introduced first The basic principle of survey method.

Described Fig. 6 is the schematic diagram that X-ray bulb focus shifts, and in the figure, A' is ideal effective focal spot, and A is Actually active focus.Predeterminated position point O is a bit on the X-ray detector.

The opening of DE expression collimator.So-called collimator is the common components in CT, is mainly used to limit the irradiation of X-ray Range.Referring to Fig. 7, which is the schematic diagram of collimator, and in the figure, the collimator includes the ontology 1 and seam of rectangular-shape Gap 2, as can be seen from the figure the width in the gap 2 is much smaller than the length in the gap 2.In the present embodiment, the collimation The opening of device refers to the width in the gap.

The X-ray of opening DE being generated by ideal effective focal spot A', across the collimator, is irradiated to X-ray detection On device, two edge lines, i.e. first edge line and second edge line, first edge line and second edge are generated in the X-axis direction Line is parallel.The X-direction refers to layer channel direction or row's channel direction, direction of the direction perpendicular to Fig. 6 paper.

Previous CT equipment, X-ray detector only have single row detector unit, and rack rotation, which is turned around, has to one layer sweep Trace designs picture.And the version after CT three generations and three generations, X-ray detector have multi-detector unit, detector cells Number of rows it is more, X-ray detector width is wider, and rack rotation turns around and can be obtained by Multi Slice Mode image, effectively increases Scan efficiency.

In the case that the X-ray detector has multi-detector unit, it is possible to there is multiple rows of channel, a row is logical Road corresponds to one layer of scan image.The channel and the detector cells can be one-to-one relationship, be also possible to one-to-many Relationship.The sampled signal of each channel output is used to calculate the pixel value of respective pixel in scan image.In the present embodiment Fig. 6 indicates multilevel access.

Point B' indicate predeterminated position point O perpendicular to first edge line intersection point, between point B' and predeterminated position point O away from From referred to as first distance；Point C' indicate predeterminated position point O perpendicular to the intersection point of second edge line, point C' and predeterminated position point O it Between distance be known as second distance.

Similarly, the X-ray of opening DE being generated by actually active focus A, across the collimator, is irradiated to X-ray On detector, two edge lines, i.e. third edge line and the 4th edge line are generated in the X-axis direction.Point B indicates predeterminated position point For O perpendicular to the intersection point of third edge line, the distance between point B and predeterminated position point O are known as third distance；Point C indicates default position Point O is set perpendicular to the intersection point of the 4th edge line, the distance between point C and predeterminated position point O are known as the 4th distance.

Third edge line and first edge line are in the left side of point O, and the 4th edge line and second edge line are on the right side of point O Side.As shown in fig. 6, first distance is not identical with third distance if ideal effective focal spot A' offset is actually active focus A , second distance and the 4th distance are also different.But no matter first distance, second distance or third distance, the 4th Distance all can not be measured directly and.The present embodiment by the relationship between first distance and second distance be converted to first away from From the relationship between corresponding channel energy value and the corresponding channel energy value of second distance, by third distance and the 4th apart from it Between relationship be converted to third apart from corresponding channel energy value and the 4th relationship between corresponding channel energy value, with It is compared by the relationship of channel energy value, to obtain whether ideal effective focal spot deviates as actually active focus.

Based on the above principles, X-ray focus provided in this embodiment detection side is discussed in detail below with reference to Fig. 8 Method.

Step S300: the mapping relations of energy ratio and distance than between are obtained in advance.

Step S301: the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb is executed.

Step S302: the first row channel set of available energy magnitude is exported in confirmation X-ray detector, and by described first Row channel set is divided into first row channel subclass and second row channel subclass.

Wherein first row channel subclass includes that one end row channel in the set of the first row channel, default row are logical Road and between all row channels, second row channel subclass includes its in addition to the subclass of the first row channel Remaining row channel.

Step S303: the first energy ratio is obtained.First energy ratio is the gross energy of first row channel subclass Ratio between value and the total energy value of second row channel subclass.

Step S304: obtaining first distance ratio according to the mapping relations and first energy ratio, described first away from From than the ratio for first distance and second distance, the first distance is distance of the predeterminated position perpendicular to first edge line, The second distance is distance of the predeterminated position perpendicular to second edge line, the predeterminated position and the default row channel Corresponding, the first edge line and the second edge line is by the x-ray bombardments of the ideal effective focal spot generation to the X Edge line on ray detector, in two row's channel directions of generation, wherein the first edge line and the first row are logical Line is integrated into the side of the predeterminated position, and the second edge line and second row channel subclass are in the default position The other side set.

Step S305: the second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed.

Step S306: confirm the second row channel set that available energy magnitude is exported in the X-ray detector, and will be described Second row channel set is divided into third row's channel subclass and the 4th row channel subclass.

Wherein third row channel subclass include one end row channel in the second row channel set, it is described default Arrange channel and between all row channels, the 4th row channel subclass include except the third row channel subclass it Remaining outer row channel.

Step S307: obtaining the second energy ratio, and second energy ratio is the gross energy that the third arranges channel subclass Ratio between value and the total energy value of the 4th row channel subclass.

Step S308: obtaining second distance ratio according to the mapping relations and second energy ratio, described second away from From than for a distance from third and the ratio of the 4th distance, the third distance is distance of the predeterminated position perpendicular to third edge line, 4th distance is distance of the predeterminated position perpendicular to the 4th edge line, the predeterminated position and the default row channel Corresponding, the third edge line and the 4th edge line is by the x-ray bombardments of the actually active focus generation to the X Edge line on ray detector, in two row's channel directions of generation, wherein the third edge line and third row are logical Line is integrated into the side of the predeterminated position, and the 4th edge line and the 4th row channel subclass are in the default position The other side set.

Step S309: if first distance ratio and second distance ratio be not identical, confirm the actually active focus It shifts relative to the ideal effective focal spot.

In practical applications, the mapping relations of the energy ratio and distance than between can be obtained by experiment.Below first Cardinal principle is introduced by taking Fig. 6 as an example.

The intersection point of line between line between ideal effective focal spot A' and predeterminated position point O, with collimator opening DE For F, and DF=FE.When the line between the ideal effective focal spot A' and predeterminated position point O is perpendicular to X-ray detector and institute When stating collimator, the vertical range between actually active focus A or described ideal effective focal spot A' and the collimator is M, in the distance in Fig. 6 between the as ideal effective focal spot A' and central point F；The actually active focus A or the reason Think that the vertical range between effective focal spot A' and the X-ray detector is n, is the ideal effective focal spot A' in Fig. 6 The distance between predeterminated position point O.

It in the present embodiment, is to occur relative to the offset of the ideal effective focal spot due to the actually active focus Z-direction, rather than in Y direction (perpendicular to the direction of horizontal plane), therefore the actually active focus and the collimator Between vertical range be equal to the vertical range between the ideal effective focal spot and the collimator.Similarly, the reality Vertical range between effective focal spot and the X-ray detector is equal to the ideal effective focal spot and the X-ray detection Vertical range between device.

Due to collimator be open DE it is known that namely DF it is known that and the vertical range m and n can be by measuring It arrives, therefore first distance B'O and second distance OC'(B'O=OC' can be calculated).

When ideal effective focal spot A' offset is actually active focus A, if it is known that third distance BO and first distance B'O Difference a, so that it may third distance BO (B'O+a) is known, it will also be appreciated that the 4th distance OC (OC'-a).

Do you so how calculate a? referring to Fig. 9, the figure be X-ray detector different row's channel receptions to energy show It is intended to, horizontal axis indicates the position in X-ray detector row channel, and the longitudinal axis indicates energy value.From this figure, it can be seen that X-ray detection Device respectively arranges the energy received in normal distribution.First curve is energy curve corresponding with ideal effective focal spot A', and second is bent Line is energy curve corresponding with actually active focus A.

In Fig. 6, first row channel set is combined into row corresponding with the point C' channel point B' and row between the two is logical Road, first row channel subclass include point B' and the corresponding row channel predeterminated position point O and row channel between the two, Second row channel subclass includes that row corresponding with the point C' channel predeterminated position point O and row between the two are logical Road.Come because the energy value in each channel can be measured, thus first row channel subclass energy total value and second row are logical The energy total value of road subclass can also obtain.

Referring to Fig. 9, the energy total value of first row channel subclass is the area of B'QO in the first curve, second row channel Gather the area that energy total value is OQC' in the first curve, wherein Q is the peak dot of the first curve.Due to predeterminated position point O about Point B' and point C' are symmetrical, therefore first energy ratio is 1.

In Fig. 6, second row channel set is combined into row corresponding with the point C channel point B and row channel between the two, Third row's channel subclass includes point B and the corresponding row channel predeterminated position point O and row channel between the two, described 4th row channel subclass includes row corresponding with the point C channel predeterminated position point O and row channel between the two.Because The energy value in each channel, which can be measured, to be come, thus third row's channel subclass energy total value and the 4th row channel subclass Energy total value can also obtain.

Referring to Fig. 9, when ideal effective focal spot A' offset is actually active focus A, the central point of energy curve is deviated by point O For point O'.Third arranges the area and the sum of area of Q'POO' that the energy total value of channel subclass is the second curve BQO', and the 4th The area that subclass energy total value in channel is POC in the second curve is arranged, midpoint Q' is the peak dot of the second curve, and point P is second The intersection point of curve and straight line QO.

For convenience of calculation, area Q'POO' may be approximately equal to the length of OO' and the product of height h, and the height h is The distance between central point between point Q and point P, point O, that is to say, that h=(OQ-OP)/2.Because OQ and OP indicates default The corresponding default row channel the location point O received energy from ideal effective focal spot A' and actually active focus A respectively, being can With what is directly obtained, therefore it also can be obtained by height h.Since the energy total value of third row's channel subclass can be known, subtract The energy total value of first row channel subclass is gone, obtained energy difference is again divided by height h, so that it may obtain OO', OO' is namely The difference a of third distance BO and first distance B'O.

Since first distance B'O and second distance OC' can be by being calculated, thus the available third distance With second distance ratio BO/OC=(B'O+a)/(OC'-a) between the 4th distance.

Above-mentioned principle is the line based on ideal effective focal spot A' and predeterminated position point O by the one of collimator opening center A special case.In practical applications, if during the line of the ideal effective focal spot A' and predeterminated position point O is open without collimator The heart, such as the position of the actually active focus A are the position of actual ideal effective focal spot, then need to obtain in advance by experiment Take the mapping relations of energy ratio and distance than between.Specifically, being obtained using the ideal effective focal spot A' in Fig. 6 as experiment benchmark Take the mapping relations of the experiment energy ratio and experiment distance of the experiment effective focal spot A of different location than between.

Referring to table 1, which is the schematic diagram of the mapping relations, different experiment energy ratios and different experiment distances than It is corresponding.

Test energy ratio	1.2	1.5	2	4
					Test distance than	1.1	1.3	1.7	2.2

After obtaining actual first energy ratio and actual second energy ratio, according to the mapping relations find with it is described The corresponding actual first distance ratio of actual first energy ratio, and it is corresponding actual with actual second energy ratio Second distance ratio.If actual first energy ratio and practical second energy ratio, can not in the mapping table It is calculated in a manner of through interpolation.

Example IV

After the embodiment three confirmed that the actually active focus shifts relative to the ideal effective focal spot, The method provided through this embodiment may further determine that the inclined of ideal effective focal spot described in the actually active focal shift Distance is moved, thus in subsequent image reconstruction process, it can be using the offset distance to the position of the actually active focus It sets and is corrected, realize the purpose for improving picture quality.

Referring to Figure 10, which is a kind of stream for X-ray focus detection method that the embodiment of the present invention four provides Cheng Tu.

Step S400: the mapping relations of energy ratio and distance than between are obtained in advance.

Step S401: the first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb is executed.

Step S402: the first row channel set of available energy magnitude is exported in confirmation X-ray detector, and by described first Row channel set is divided into first row channel subclass and second row channel subclass.

Step S403: obtaining the first energy ratio, and first energy ratio is the gross energy of first row channel subclass Ratio between value and the total energy value of second row channel subclass.

Step S404: obtaining first distance ratio according to the mapping relations and first energy ratio, described first away from From than the ratio for first distance and second distance, the first distance is distance of the predeterminated position perpendicular to first edge line, The second distance is distance of the predeterminated position perpendicular to second edge line, the predeterminated position and the default row channel Corresponding, the first edge line and the second edge line is by the x-ray bombardments of the ideal effective focal spot generation to the X Edge line on ray detector, in two row's channel directions of generation, wherein the first edge line and the first row are logical Line is integrated into the side of the predeterminated position, and the second edge line and second row channel subclass are in the default position The other side set.

Step S405: the second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed.

Step S406: confirm the second row channel set that available energy magnitude is exported in the X-ray detector, and will be described Second row channel set is divided into third row's channel subclass and the 4th row channel subclass.

Step S407: obtaining the second energy ratio, and second energy ratio is the gross energy that the third arranges channel subclass Ratio between value and the total energy value of the 4th row channel subclass.

Step S408: obtaining second distance ratio according to the mapping relations and second energy ratio, described second away from From than for a distance from third and the ratio of the 4th distance, the third distance is distance of the predeterminated position perpendicular to third edge line, 4th distance is distance of the predeterminated position perpendicular to the 4th edge line, the predeterminated position and the default row channel Corresponding, the third edge line and the 4th edge line is by the x-ray bombardments of the actually active focus generation to the X Edge line on ray detector, in two row's channel directions of generation, wherein the third edge line and third row are logical Line is integrated into the side of the predeterminated position, and the 4th edge line and the 4th row channel subclass are in the default position The other side set.

Step S409: if first distance ratio and second distance ratio be not identical, confirm the actually active coke Point shifts relative to the ideal effective focal spot, and executes step S410.

Step S410: according to the first distance than, the second distance than, the opening width of collimator, the reality Vertical range and the actually active focus or institute between effective focal spot or the ideal effective focal spot and the collimator The vertical range between ideal effective focal spot and the X-ray detector is stated, the actually active focus and the ideal are obtained Offset distance between effective focal spot.

In the present embodiment, after obtaining the first distance ratio radio1 and second distance ratio radio2, according to The first distance ratio radio1, second distance ratio radio2, the opening width DE of collimator, the actually active focus Or vertical range m and the actually active focus or the ideal between the ideal effective focal spot and the collimator Vertical range n between effective focal spot and the X-ray detector obtains the actually active focus and the ideal effectively coke Offset distance x between point:

It wherein, is to work as the actually active focus and the ideal effective focal spot respectively in the embodiment the case where "+" It is used as the two sides of the ideal effective focal spot A' of experiment in three；The case where "-" is when the actually active focus and the ideal have Effect focus is used as the same side of the ideal effective focal spot A' of experiment in the embodiment three respectively.

Based on a kind of X-ray focus detection method that above embodiments provide, the embodiment of the present invention is also provided Its working principle is described in detail with reference to the accompanying drawing in a kind of X-ray focus detection device.

Embodiment five

Referring to Figure 11, which is a kind of knot for X-ray focus detection device that the embodiment of the present invention five provides Structure block diagram.

X-ray focus detection device provided in this embodiment includes:

First scanning element 101, the first parameter acquiring unit 102, the second scanning element 103, the second parameter acquiring unit 104 and confirmation unit 105；

Wherein, first scanning element 101 is penetrated for executing the X for using the ideal effective focal spot of X-ray bulb to generate First scanning of line；

First parameter acquiring unit 102, for leading to according to being preset in the X-ray detector according to preset rules First energy value of road output obtains the first parameter；

Second scanning element 103, the X that the actually active focus for executing using the X-ray bulb generates are penetrated Second scanning of line；

Second parameter acquiring unit 104 is used for according to the preset rules, according to pre- in the X-ray detector If the second energy value of channel output obtains the second parameter；

The confirmation unit 105 confirms the reality if mismatching for first parameter and second parameter Effective focal spot shifts relative to the ideal effective focal spot.

Optionally, first parameter acquiring unit 102 includes: that first row channel set confirmation unit and the first parameter are true Recognize unit；

Second parameter acquiring unit 104 includes: second row channel set confirmation unit and the second parameter confirmation unit；

Optionally, described device further include:

What the X-ray focus detection device that the embodiment five provides can be applied any with processor On electronic equipment, the electronic equipment can be it is existing, researching and developing or in the future research and development any electronic equipments, including but It is not limited to: existing, researching and developing or research and development in the future desktop computers, laptop computer, mobile terminal (including intelligence Mobile phone, non-smart mobile phone, various tablet computers) etc..Installation practice can by software realization, can also by hardware or The mode of software and hardware combining is realized.It taking software implementation as an example, is by being had where it as the device on a logical meaning Computer program instructions corresponding in memory are read into memory what operation was formed by the processor of the electronic equipment of processor. For hardware view, as shown in figure 12, for the electricity for having processor where X-ray focus detection device of the present invention A kind of hardware structure diagram of sub- equipment other than processor, memory, network interface and memory shown in Figure 12, is implemented The equipment of optical projection system in example where device or electronic equipment with processor generally according to the equipment actual functional capability, also It may include other hardware, such as display, this repeated no more.

Wherein, the corresponding logical order of X-ray focus detection method, the storage can store in memory Device for example can be nonvolatile memory (non-volatile memory), and processor, which can call, to be executed in memory The logical order of preservation, to execute above-mentioned X-ray focus detection method, if display is used for first parameter It is mismatched with second parameter, then shows the knot that the actually active focus shifts relative to the ideal effective focal spot Fruit.

The function of the corresponding logical order of X-ray focus detection method, if with the shape of software function module Formula realize and when sold or used as an independent product, can store in a computer readable storage medium.It is based on Such understanding, technical solution of the present invention substantially the part that contributes to existing technology or the technical solution in other words Part can be embodied in the form of software products, which is stored in a storage medium, including Some instructions are used so that a computer equipment (can be personal computer, server or the network equipment etc.) executes sheet Invent all or part of the steps of each embodiment the method.And storage medium above-mentioned include: USB flash disk, it is mobile hard disk, read-only Memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or The various media that can store program code such as person's CD.

A kind of X-ray focus detection method and device provided based on above embodiments, the embodiment of the present invention It additionally provides a kind of X-ray focus detection device, its working principle is described in detail with reference to the accompanying drawing.

Embodiment six

The present embodiment provides a kind of X-ray focus detection device, the equipment includes: processor, for depositing Store up the memory and display of the processor-executable instruction；

Processor, memory and display for storing the processor-executable instruction；

Wherein, the processor is configured to:

When introducing elements of various embodiments of the present invention, the article " one ", "one", " this " and " described " be intended to Indicate one or more elements.Word "include", "comprise" and " having " are all inclusive and mean in addition to listing Except element, there can also be other elements.

It should be noted that those of ordinary skill in the art will appreciate that realizing the whole in above method embodiment or portion Split flow is relevant hardware can be instructed to complete by computer program, and the program can be stored in a computer In read/write memory medium, the program is when being executed, it may include such as the process of above-mentioned each method embodiment.Wherein, the storage Medium can be magnetic disk, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..

All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method Part explanation.The apparatus embodiments described above are merely exemplary, wherein described be used as separate part description Unit and module may or may not be physically separated.Furthermore it is also possible to select it according to the actual needs In some or all of unit and module achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying In the case where creative work, it can understand and implement.

The above is only a specific embodiment of the invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims

1. a kind of X-ray focus detection method, which is characterized in that the described method includes:

The first scanning of the X-ray generated using the ideal effective focal spot of X-ray bulb is executed, and according to preset rules, according to The first energy value that channel output is preset in the X-ray detector obtains the first parameter；

The second scanning of the X-ray generated using the actually active focus of the X-ray bulb is executed, and according to the default rule Then, the second parameter is obtained according to the second energy value for presetting channel output in the X-ray detector；

If first parameter and second parameter mismatch, confirm that the actually active focus has relative to the ideal Effect focus shifts；Wherein, described according to preset rules, according to the first of channel default in X-ray detector output Energy value obtains the first parameter

Confirm the first row channel set for exporting available energy magnitude in X-ray detector, and first row channel set is drawn It is divided into first row channel subclass and second row channel subclass, wherein first row channel subclass includes the first row One end row channel, default row channel in the set of channel and between all row channels, the second row channel subclass packet Include remaining row channel in addition to the subclass of the first row channel；

Institute is obtained according to the total energy value of the total energy value of first row channel subclass and second row channel subclass The first parameter is stated, the total energy value of first row channel subclass is that channel difference is respectively arranged in the subclass of the first row channel The sum of corresponding energy value, the total energy value of second row channel subclass are that respectively row is logical in the subclass of the second row channel The sum of corresponding energy value in road；

It is described according to the preset rules, obtain the according to the second energy value for presetting channel output in the X-ray detector Two parameters include:

Confirm the second row channel set that available energy magnitude is exported in the X-ray detector, and by the second row channel set Conjunction is divided into third row's channel subclass and the 4th row channel subclass, wherein third row's channel subclass includes described the Two row channels set in one end row channel, the default row channel and between all row channels, the 4th row channel Subclass includes remaining row channel in addition to the third arranges channel subclass；

Institute is obtained according to the total energy value of the total energy value of third row's channel subclass and the 4th row channel subclass The second parameter is stated, the total energy value of the third row channel subclass is respectively to arrange channel difference in third row's channel subclass The sum of corresponding energy value, the total energy value of the 4th row channel subclass are that respectively row is logical in the subclass of the 4th row channel The sum of corresponding energy value in road.

2. the method according to claim 1, wherein the method also includes:

It is described to be obtained according to the total energy value of first row channel subclass and the total energy value of second row channel subclass Include: to the first parameter

Obtain the first energy ratio, total energy value and the second row of first energy ratio for first row channel subclass Ratio between the total energy value of channel subclass；

First distance ratio is obtained according to the mapping relations and first energy ratio, the first distance ratio is first distance With the ratio of second distance, the first distance is distance of the predeterminated position perpendicular to first edge line, and the second distance is For the predeterminated position perpendicular to the distance of second edge line, the predeterminated position is corresponding with the default row channel, and described first In the x-ray bombardment to the X-ray detector that edge line is generated with the second edge line by the ideal effective focal spot, The edge line in two row's channel directions generated, wherein the first edge line and first row channel subclass are in institute The side of predeterminated position is stated, the second edge line and second row channel subclass are in the other side of the predeterminated position；

Institute is obtained according to the total energy value of the total energy value of third row's channel subclass and the 4th row channel subclass Stating the second parameter includes:

Obtain the second energy ratio, total energy value and fourth row of second energy ratio for third row's channel subclass Ratio between the total energy value of channel subclass；

Second distance ratio is obtained according to the mapping relations and second energy ratio, the second distance ratio is third distance With the ratio of the 4th distance, the third distance is distance of the predeterminated position perpendicular to third edge line, and the 4th distance is The predeterminated position is perpendicular to the distance of the 4th edge line, and the predeterminated position is corresponding with the default row channel, the third In the x-ray bombardment to the X-ray detector that edge line is generated with the 4th edge line by the actually active focus, The edge line in two row's channel directions generated, wherein the third edge line and third row's channel subclass are in institute The side of predeterminated position is stated, the 4th edge line and the 4th row channel subclass are in the other side of the predeterminated position；

If first parameter and second parameter mismatch include:

If the first distance ratio and second distance ratio be not identical.

3. according to the method described in claim 2, it is characterized in that, the method also includes:

According to the first distance than, the second distance than, the opening width of collimator, the actually active focus or described Vertical range and the actually active focus or the ideal effective focal spot between ideal effective focal spot and the collimator With the vertical range between the X-ray detector, obtain between the actually active focus and the ideal effective focal spot Offset distance.

4. according to claim 1 to method described in 3 any one, which is characterized in that first row channel set and described Gather the column channel of corresponding same range in second row channel.

5. a kind of X-ray focus detection device, which is characterized in that described device includes: the first scanning element, first Parameter acquiring unit, the second scanning element, the second parameter acquiring unit and confirmation unit；

Wherein, first scanning element, for executing the of the X-ray for using the ideal effective focal spot of X-ray bulb to generate One scanning；

First parameter acquiring unit, for being exported according to channel default in the X-ray detector according to preset rules First energy value obtains the first parameter；

Second scanning element, the second of the X-ray that the actually active focus for executing using the X-ray bulb generates Scanning；

Second parameter acquiring unit is used for according to the preset rules, defeated according to channel is preset in the X-ray detector The second energy value out obtains the second parameter；

The confirmation unit confirms the actually active coke if mismatching for first parameter and second parameter Point shifts relative to the ideal effective focal spot；Wherein, first parameter acquiring unit includes: first row channel set Confirmation unit and the first parameter confirmation unit；

Confirmation unit is gathered in the first row channel, for confirming that the first row for exporting available energy magnitude in X-ray detector is logical Road set, and first row channel set is divided into first row channel subclass and second row channel subclass, wherein institute State first row channel subclass include one end row channel in the set of the first row channel, default row channel and between institute There is row channel, second row channel subclass includes remaining row channel in addition to the subclass of the first row channel；

The first parameter confirmation unit, for logical according to the total energy value of first row channel subclass and the second row The total energy value of road subclass obtains first parameter, and the total energy value of first row channel subclass is the first row The sum of corresponding energy value in channel is respectively arranged in the subclass of channel, the total energy value of second row channel subclass is described The sum of corresponding energy value in channel is respectively arranged in the subclass of second row channel；

Confirmation unit is gathered in the second row channel, and the second of available energy magnitude is exported in the X-ray detector for confirming Channel set is arranged, and second row channel set is divided into third row's channel subclass and the 4th row channel subclass, Described in third row's channel subclass include one end row channel in the set of the second row channel, the default row channel and Between all row channels, the 4th row channel subclass include except the third arrange channel subclass in addition to remaining row Channel；

The second parameter confirmation unit, the total energy value and the 4th row for arranging channel subclass according to the third are logical The total energy value of road subclass obtains second parameter, and the total energy value of the third row channel subclass is third row The sum of corresponding energy value in channel is respectively arranged in the subclass of channel, the total energy value of the 4th row channel subclass is described The sum of corresponding energy value in channel is respectively arranged in 4th row channel subclass.

6. device according to claim 5, which is characterized in that described device further include:

The first energy ratio acquiring unit, for obtaining the first energy ratio, first energy ratio is the first row channel Ratio between the total energy value of subclass and the total energy value of second row channel subclass；

The first distance is than acquiring unit, for obtaining first distance according to the mapping relations and first energy ratio Than for the first distance than the ratio for first distance and second distance, the first distance is predeterminated position perpendicular to first The distance of edge line, the second distance be the predeterminated position perpendicular to second edge line distance, the predeterminated position with The default row channel is corresponding, and the first edge line and the second edge line are the X generated by the ideal effective focal spot Edge line on radiation exposure to the X-ray detector, in two row's channel directions of generation, wherein the first edge Line and first row channel subclass are in the side of the predeterminated position, the second edge line and second row channel It is integrated into the other side of the predeterminated position；

The second energy ratio acquiring unit, for obtaining the second energy ratio, second energy ratio is that the third arranges channel Ratio between the total energy value of subclass and the total energy value of the 4th row channel subclass；

The second distance is than acquiring unit, for obtaining second distance according to the mapping relations and second energy ratio Than the second distance is predeterminated position perpendicular to third than the ratio for third distance and the 4th distance, the third distance The distance of edge line, it is described 4th distance be the predeterminated position perpendicular to the 4th edge line distance, the predeterminated position with The default row channel is corresponding, and the third edge line and the 4th edge line are the X generated by the actually active focus Edge line on radiation exposure to the X-ray detector, in two row's channel directions of generation, wherein the third edge Line and third row's channel subclass are in the side of the predeterminated position, the 4th edge line and the 4th row channel It is integrated into the other side of the predeterminated position；

The confirmation unit confirms the reality if not identical specifically for the first distance ratio and second distance ratio Border effective focal spot shifts relative to the ideal effective focal spot.

7. device according to claim 6, which is characterized in that described device further include:

Offset distance acquiring unit, for according to the first distance than, the second distance than, collimator opening width, Vertical range between the actually active focus or the ideal effective focal spot and the collimator and described actually active Vertical range between focus or the ideal effective focal spot and the X-ray detector, obtain the actually active focus with Offset distance between the ideal effective focal spot.

8. a kind of X-ray focus detection device, which is characterized in that the equipment includes: processor, for storing State the memory and display of processor-executable instruction；

Wherein, the processor is configured to:

The display shows the actually active focus if mismatching for first parameter and second parameter The result to shift relative to the ideal effective focal spot；

Wherein, described according to preset rules, the is obtained according to the first energy value for presetting channel output in the X-ray detector One parameter includes: