CN108811287A - A kind of face battle array multifocal grid-control radiographic source and its CT equipment - Google Patents
A kind of face battle array multifocal grid-control radiographic source and its CT equipment Download PDFInfo
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- CN108811287A CN108811287A CN201810690692.5A CN201810690692A CN108811287A CN 108811287 A CN108811287 A CN 108811287A CN 201810690692 A CN201810690692 A CN 201810690692A CN 108811287 A CN108811287 A CN 108811287A
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- 230000000712 assembly Effects 0.000 claims description 17
- 238000000429 assembly Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000010894 electron beam technology Methods 0.000 claims description 15
- 239000002826 coolant Substances 0.000 claims description 6
- 229910018503 SF6 Inorganic materials 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 8
- 230000003116 impacting effect Effects 0.000 abstract description 3
- 239000004576 sand Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 239000007769 metal material Substances 0.000 description 3
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/30—Controlling
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/56—Switching-on; Switching-off
Abstract
The invention discloses a kind of face battle array multifocal grid-control radiographic source and its CT equipments.The grid-control radiographic source includes shell, and filament supply, grid-control power supply and multiple X-ray tubes are provided in shell, and filament supply is connect with the cathode of X-ray tube respectively, and grid-control power supply switchs with the grid-control of X-ray tube connect respectively.This grid-control radiographic source, which switchs to correspond to respectively by multiple grid-control, controls the time for exposure of multiple independent X-ray tubes and being switched fast for unwrapping wire, so that each X-ray tube generates X-ray to same position according to preset rules, to form the multiple focuses arranged according to default spread geometry.There is no other interference X-rays to generate in the exposure interval of continuous two X-ray tubes of this grid-control radiographic source, it avoids and generates excessive invalid sand permeation and influence to be imaged, and the energy level for the X-ray that this grid-control radiographic source generates is almost the same, it also avoids impacting imaging, to improve image quality.
Description
Technical field
The present invention relates to a kind of radiographic source more particularly to a kind of face battle array multifocal grid-control radiographic source, (hereinafter referred to as grid-control is penetrated
Line source), also relate to include the grid-control radiographic source CT equipment, belong to radiography field.
Background technology
In traditional radiographic imaging arts, most of emitted from single x-ray source to a large area detector
Wide beam X-ray, as shown in Figure 1.Since Compton effect can occur between X-ray and testee so that x-ray projection to spy
Scattering phenomenon is will produce during surveying device assembly, because detector area is bigger, many scattered rays can be projected directly at spy
It surveys on device surface, to reduce the contrast and clarity of image, while can also reduce the signal-to-noise ratio of image slight part.
As shown in Fig. 2, in order to reduce influence of the scattering phenomenon to imaging, reversed geometry imaging system may be used, it is adopted
With face battle array multifocal radiographic source, each focus emits narrow beam X-ray to a small area detector in turn, so as to obtain one
Data of the group for volume imaging.Because detector area is smaller, the scattered rays for projecting detector surface is seldom.
In general, face battle array multifocal radiographic source uses transmission anode target, it makes electron beam beat in anode target by electromagnetic deflection
Different location, there are one having opened very lacunary limit binding structure being made of high-density matter, Mei Ge little behind target surface
Hole site can project emergent ray, be considered as one " focus ", and the ray of remaining position of target surface is all absorbed by limit binding structure.It is this
Radiographic source is although simple in structure, of low cost, and multifocal alternating speed is fast, and focus distribution density is high, but this radiographic source
Deflection of a beam of electrons is continuous, and (time interval and location interval) is also to generate ray always between two " focus ",
The ray generated during this is actually that will not be used, but can be spilt by limiting the aperture on binding structure, at
As interfering.Meanwhile as shown in figure 3, make electron beam beat on anode target by electromagnetic deflection, many electron beams and anode target
Between angle nor 90 °, and the angle of different location electron beam and anode target is also different, this to limit different on binding structure
The ray projected at the aperture of position has energy level difference, this can also have an impact imaging.
Invention content
Primary technical problem to be solved by this invention is to provide a kind of face battle array multifocal grid-control radiographic source.
Another technical problem to be solved by this invention is to provide a kind of CT equipment including above-mentioned grid-control radiographic source.
To achieve the goals above, the present invention uses following technical proposals：
According to a first aspect of the embodiments of the present invention, a kind of face battle array multifocal grid-control radiographic source, including shell are provided, it is described
It is provided with filament supply, grid-control power supply and multiple X-ray tubes in shell, filament supply the moon with the X-ray tube respectively
Pole connects, and the grid-control power supply switchs with the grid-control of the X-ray tube connect respectively；
The filament supply is used to make the cathode of each X-ray tube to generate the electronics for meeting preset quantity, the grid
Control power supply is used to control the grid-control switch of each X-ray tube so that the electron beam that the X-ray tube cathode surface generates is pressed
Corresponding anode is bombarded according to preset rules and generates X-ray, forms the multiple focuses arranged according to default spread geometry.
Wherein more preferably, each X-ray tube includes vacuum cavity, anode assemblies, cathode assembly and grid-control switch；
The anode assemblies and the cathode assembly are packaged in the inside of the vacuum cavity, and the anode assemblies are positioned at described true
One end of cavity body, the cathode assembly are located at the other end of the vacuum cavity, and the grid-control switch is arranged in the anode
Between component and the cathode assembly, and close to the cathode assembly.
Wherein more preferably, the anode assemblies surface is provided with transmission anode target, and the transmission anode target uses atomic number
The metal material that number is high, fusing point is high is made.
Wherein more preferably, the cathode assembly includes focus mask and cathode filament, and the cathode filament setting is described poly-
Coke cover is internal, and the cathode filament is connect with the filament supply, and the filament supply is connect with external high pressure power supply.
Wherein more preferably, be provided on the position of the focus mask face anode target surface power supply beamlet by opening.
Wherein more preferably, do not have in the exposure interval of continuous two X-ray tubes of the grid-control radiographic source other dry
Disturb X-ray generation.
Wherein more preferably, the X-ray tube is arranged on one or more ray pipe holders, and passes through the ray tube branch
Frame is fixed on the predeterminated position of the enclosure.
Wherein more preferably, be provided with multiple through-holes on the ray pipe holder, the anodes of multiple X-ray tubes respectively from
It stretches out, and is separately fixed on the ray pipe holder in the corresponding through-hole.
Wherein more preferably, according to the default arrangement of the multiple focuses and the focus formed needed for the grid-control radiographic source
Shape adjusts the shape of the ray pipe holder, the position of the through-hole and each X-ray tube anode to the ray tube branch
The distance between frame.
Wherein more preferably, coolant is filled in the interval of each X-ray tube, for realizing to the grid-control radiographic source
Heat dissipation；The coolant includes but not limited to transformer oil or sulfur hexafluoride gas.
Wherein more preferably, the X-ray tube include but not limited to the X-ray tube of plus earth type, minus earth type X penetrate
The X-ray tube of spool or neutral ground type.
According to a second aspect of the embodiments of the present invention, a kind of CT equipment is provided, the CT equipment includes that above-mentioned face battle array is more
Focus grid-control radiographic source.
Grid-control radiographic source provided by the present invention switchs the corresponding multiple independent X-ray tubes of control respectively by multiple grid-control
Time for exposure and unwrapping wire be switched fast so that each X-ray tube to same position (drafting detector position) according to
Preset rules generate X-ray, to form the multiple focuses arranged according to default spread geometry.Continuous the two of this grid-control radiographic source
There is no other interference X-rays to generate in the exposure interval of a X-ray tube, avoid the excessive omission ray of generation and influence to be imaged,
And the energy level for the X-ray that this grid-control radiographic source generates is almost the same, also avoids impacting imaging, to improve into
Image quality amount.
Description of the drawings
Fig. 1 is the image-forming principle schematic diagram in existing x-ray source；
Fig. 2 is existing reversed geometry image-forming principle schematic diagram；
Fig. 3 is existing face battle array multifocal radiographic source simplified schematic diagram；
Fig. 4 is the structural schematic diagram of grid-control radiographic source provided by the present invention；
Fig. 5 is the structural schematic diagram of X-ray tube in grid-control radiographic source provided by the present invention；
Fig. 6 is the external structure schematic diagram of X-ray tube in grid-control radiographic source provided by the present invention；
Fig. 7 is the principle schematic of single X-ray tube in grid-control radiographic source provided by the present invention；
Fig. 8 is the arrangement schematic diagram 1 of X-ray tube in grid-control radiographic source provided by the present invention；
Fig. 9 is the arrangement schematic diagram 1 of focus in grid-control radiographic source provided by the present invention；
Figure 10 is the arrangement schematic diagram 2 of focus in grid-control radiographic source provided by the present invention；
Figure 11 is the arrangement schematic diagram 3 of focus in grid-control radiographic source provided by the present invention；
Figure 12 is the arrangement schematic diagram 4 of focus in grid-control radiographic source provided by the present invention.
Specific implementation mode
The technology contents of the present invention are described in further detail in the following with reference to the drawings and specific embodiments.
As shown in figure 4, grid-control radiographic source provided by the present invention includes shell 1, be provided in shell 1 filament supply 2,
Grid-control power supply 3 and multiple X-ray tubes 4, filament supply 2 are connect with the cathode of each X-ray tube 4 respectively, grid-control power supply 3 respectively with
The grid-control switch connection of X-ray tube 4；Filament supply is used to make the cathode surface of each X-ray tube 4 to generate electronics, grid-control power supply 3
Grid-control for controlling each X-ray tube 4 switchs so that the electron beam for meeting preset quantity that 4 cathode of each X-ray tube generates
(electronics for generating meet demand quantity in a certain range) bombards corresponding anode according to preset rules and generates X-ray, to
Form the multiple focuses (focus of x-ray source) arranged according to default spread geometry.Wherein, according to the arrangement of default spread geometry
Multiple focuses can be generally aligned in the same plane or cambered surface on, may be located in multiple planes or cambered surface.
As shown in Figure 5 and Figure 6, each X-ray tube 4 includes vacuum cavity 401, anode assemblies 402, cathode assembly 403
And grid-control switch 404；Anode assemblies 402 and cathode assembly 403 are packaged in the inside of vacuum cavity 401, and anode assemblies 402
Positioned at one end of vacuum cavity 401, cathode assembly 403 is located at the other end of vacuum cavity 401, to be respectively formed X-ray tube
Anode and cathode；The anode and cathode of each X-ray tube 4 is connect with external high pressure power supply respectively, for making X-ray tube 4
Between anode and cathode can with tens, up to a hundred kilovolts of voltage difference.Grid-control switch 404 is arranged in anode assemblies 402 and the moon
Between pole component 403, and close to cathode assembly.Wherein, the surface of 402 (not shown) of anode assemblies is provided with transmission sun
The anode target surface of pole target, the transmission anode target is parallel to horizontal plane；Transmission anode target may be used the atomic numbers such as tungsten it is high,
The high metal material of fusing point is made.The side of the anode target surface of transmission anode target is used to receive the electron beam of cathode assembly transmitting
Bombardment, the other side of anode target surface is for projecting away the X-ray that anode target surface generates, to form a focus.Cathode
403 (not shown) of component includes focus mask and cathode filament, and cathode filament is arranged inside focus mask, and focus mask is by metal
Material is made, and opening is provided on the position of focus mask face anode target surface, which is electron beam channel, for limiting electricity
The diverging of beamlet.
The cathode filament of each X-ray tube is connect with filament supply 2 respectively, and filament supply 2 and external high pressure power supply are connected
It connects, the size of current that filament supply 2 is controlled by external high pressure power supply heats cathode filament under the action of filament supply 2
To preset temperature (such as 2000 DEG C~3000 DEG C) so that cathode filament surface generates electronics (the enough work for meeting preset quantity
The electronics of jump).Wherein, cathode filament can be made of dystectic tungsten filament.Equally grid-control power supply 3 and external high pressure power supply are connected
It connects, controlling each grid-control switch 404 by grid-control power supply 3 is on or off-state；Specifically, as shown in fig. 7, with single
For plus earth type X-ray tube, when the control grid-control of grid-control power supply 3 switch 404 is in the conduction state, and pass through grid-control electricity
Source 3 can apply a backward voltage (such as backward voltage is -130KV) to grid-control switch 404, what grid-control switch 404 was applied in
Backward voltage is more than the voltage (voltage of such as cathode is -120KV) of the cathode of X-ray tube, to inhibit cathode filament surface to produce
The raw electronics for meeting preset quantity flies to the transmission anode target on anode assemblies surface；When grid-control switch 404 be applied in it is reversed
When voltage is sufficiently large, the electrons that cathode filament surface generated meet preset quantity be all suppressed in cathode filament surface and
The transmission anode target on anode assemblies surface cannot be flown to.When grid-control power supply 3, which controls grid-control switch 404, to be off, grid
The backward voltage that control switch 404 is applied in disappears so that forms pressure difference between the cathode and anode of X-ray tube, at this time cathode modulation
A large amount of electrons that silk table face generates form the transmission sun that electron beam flies to anode assemblies surface under larger energy of position effect
Pole target, and the anode target surface of transmission anode target is directly bombarded, X-ray is generated, and project away from beam orifice, to form one
Focus.
Therefore, in multiple focuses that this grid-control radiographic source generates, each focus corresponds to an individual X-ray tube, often
The unwrapping wire break-make of a X-ray tube switchs control by the grid-control of the X-ray tube.It is penetrated by the grid-control switch control X of each X-ray tube
Spool exposes unwrapping wire one by one, and the cathode of each X-ray tube fly to transmission anode target electron beam it is vertical with anode target surface, from
And it ensure that the energy level for the ray that each X-ray tube generates is consistent.
In grid-control radiographic source provided by the present invention, penetrated as shown in figure 4, multiple X-ray tubes 4 are arranged in one or more
It in 5 (not shown) of spool holder, and is fixed on the predeterminated position inside shell 1 by ray pipe holder 5, and shell
It is close that the small lightweight beryllium material (being referred to as beryllium window) of atomic number may be used in the side of each 4 anode of X-ray tube of 1 face
Envelope.Specifically, being provided with multiple through-holes on ray pipe holder 5, the anode of multiple X-ray tubes 4 is respectively from ray pipe holder 5
It is stretched out in through-hole, also, multiple X-ray tubes 4 are fixed on by flange on ray pipe holder 5 respectively.Wherein, each X-ray tube 4
Cathode is located at the side of ray pipe holder 5, and towards the inside of shell 1；The anode of each X-ray tube 4 is located at ray pipe holder 5
The other side, and towards the outside of shell 1 (towards small area detector).
It, can be according to shape needed for this grid-control radiographic source when X-ray tube 4 is arranged on one or more ray pipe holders 5
At the multiple focuses arranged according to default spread geometry, the through-hole in the shape of adjustment ray pipe holder 5, ray pipe holder 5
Position and 4 anode of each X-ray tube the distance between to ray pipe holder 5.For example, as shown in Figure 8 and Figure 9, it is assumed that this grid-control
The spread geometry of the multiple focuses formed needed for radiographic source is matrix and is generally aligned in the same plane, and rectangle ray pipe holder may be used
5, and multiple through-holes are set on the ray pipe holder 5, the position of multiple through-holes is corresponding with the position of multiple focuses；By multiple X
The anode of ray tube 4 is stretched out from the through-hole of ray pipe holder 5 respectively, and multiple X-ray tubes 4 are fixed on ray by flange respectively
On pipe holder 5, and ensure that the anode of each X-ray tube 4 is identical to the distance between ray pipe holder 5.By controlling each X-ray tube
4 grid-control switch 404 so that the electron beam that 4 cathode surface of each X-ray tube generates bombards corresponding anode according to preset rules and produces
Raw X-ray, to form multiple focuses of matrix arrangement.
As shown in Figure 10, it is assumed that the spread geometry of the multiple focuses formed needed for this grid-control radiographic source is curve and is located at same
In one plane, arc or rectangle ray pipe holder 5 may be used, and multiple through-holes, Duo Getong are set on the ray pipe holder 5
The position in hole is corresponding with the position of multiple focuses；The anode of multiple X-ray tubes 4 is stretched from the through-hole of ray pipe holder 5 respectively
Go out, multiple X-ray tubes 4 are fixed on by flange on ray pipe holder 5 respectively, and ensure the anode of each X-ray tube 4 to ray tube
The distance between holder 5 is identical.By the grid-control switch 404 for controlling each X-ray tube 4 so that 4 cathode surface of each X-ray tube produces
Raw electron beam bombards corresponding anode according to preset rules and generates X-ray, to multiple focuses of forming curves formula arrangement.
As shown in FIG. 11 and 12, it is assumed that the spread geometry of the multiple focuses formed needed for this grid-control radiographic source is array and position
In an arc, rectangle or stepped ray pipe holder 5 in two planes or cambered surface, may be used, and in the ray pipe holder 5
The upper multiple through-holes of setting, the position of multiple through-holes are corresponding with the position of multiple focuses；By the anode of multiple X-ray tubes 4 respectively from
Stretched out in the through-hole of ray pipe holder 5, multiple X-ray tubes 4 are fixed on by flange on ray pipe holder 5 respectively, and ensure with
The anode of the corresponding X-ray tube of focus on same plane or cambered surface 4 is identical to the distance between ray pipe holder 5, and and its
In the anode of the corresponding X-ray tube of focus in a plane or cambered surface 4 be more than or less than to the distance between ray pipe holder 5
The anode of X-ray tube corresponding with the focus in another plane or cambered surface 4 is the distance between to ray pipe holder 5.Pass through control
Make the grid-control switch 404 of each X-ray tube 4 so that the electron beam that 4 cathode surface of each X-ray tube generates is bombarded according to preset rules
Corresponding anode generates X-ray, to form multiple focuses of array arrangement.Wherein it is possible to using logical in ray pipe holder 5
The gasket of (anode of X-ray tube 4 stretches into side) and the anode clamping position setting different-thickness of X-ray tube 4, realizes X on the inside of hole
The anode of ray tube 4 between ray pipe holder 5 have different distance.
As shown in FIG. 11 and 12, it is assumed that the spread geometry of the multiple focuses formed needed for this grid-control radiographic source is array and position
In in two planes or cambered surface, two arcs or rectangle ray pipe holder 5 can also be used, and set on the ray pipe holder 5
Multiple through-holes are set, the position of multiple through-holes is corresponding with the position of multiple focuses；By the anode of multiple X-ray tubes 4 respectively from ray
It is stretched out in the through-hole of pipe holder 5, multiple X-ray tubes 4 are fixed on by flange on ray pipe holder 5 respectively, and are ensured same
Arc or the anode of the X-ray tube 4 on rectangle ray pipe holder 5 are identical to the distance between the ray pipe holder 5, an arc
Or the anode of the X-ray tube 4 on rectangle ray pipe holder 5 is more than or less than another to the distance between the ray pipe holder 5
Arc or the anode of the X-ray tube 4 on rectangle ray pipe holder 5 are the distance between to the ray pipe holder 5.By controlling each X
The grid-control switch 404 of ray tube 4 so that the electron beam that 4 cathode surface of each X-ray tube generates bombards corresponding according to preset rules
Anode generates X-ray, to form multiple focuses of array arrangement.
Wherein, preset rules refer to the unwrapping wire scan control mode of focus, can be unwrapping wire scanning line by line, that is, pass through control
Make the grid-control switch 404 of each X-ray tube 4 so that each X-ray tube 4 exposes unwrapping wire line by line；It can also be unwrapping wire scanning by column, i.e.,
By the grid-control switch 404 for controlling each X-ray tube 4 so that each X-ray tube 4 exposes unwrapping wire by column；It can also be swept by face unwrapping wire
It retouches, i.e. the grid-control switch 404 by controlling each X-ray tube 4 so that each X-ray tube 4 exposes unwrapping wire by face；Can also inter-bank, across
Row or the scanning of across face unwrapping wire, i.e. the grid-control switch 404 by controlling each X-ray tube 4 so that 4 inter-bank of each X-ray tube, across arranging or
Across face exposure unwrapping wire；The specific unwrapping wire scan control mode of focus can do different control modes according to practical application mode and set
Meter.
In order to realize the heat dissipation to this grid-control radiographic source, coolant can be filled in the interval of each X-ray tube 4,
Coolant can be flowable high voltage insulating materials, such as transformer oil (high voltage insulating oil) or sulfur hexafluoride gas
(SF6), wherein with transformer oil best results.
This grid-control radiographic source not only can be adapted for the X-ray tube of plus earth type, can be applicable to minus earth type
X-ray tube or neutral ground type X-ray tube.In the case of the X-ray tube of minus earth type, cathode and focus mask
It is grounded, and applies positive high voltage to transmission anode target.In the case of the X-ray tube of neutral ground type, to cathode and
Focus mask applies negative high voltage, applies positive high voltage to transmission anode target.
Grid-control radiographic source provided by the present invention switchs the corresponding multiple independent X-ray tubes of control respectively by multiple grid-control
Time for exposure and unwrapping wire be switched fast so that each X-ray tube to same position (drafting detector position) according to
Preset rules generate X-ray, to form the multiple focuses arranged according to default spread geometry.Continuous the two of this grid-control radiographic source
There is no other interference X-rays to generate in the exposure interval of a X-ray tube, avoid the excessive omission ray of generation and influence to be imaged,
And the energy level for the X-ray that this grid-control radiographic source generates is almost the same, also avoids impacting imaging, to improve into
Image quality amount.
The present invention also provides a kind of CT equipment, which includes above-mentioned grid-control radiographic source, to avoid generating
Excessive invalid sand permeation and influence to be imaged, improve the image quality of CT equipment.The other structures of CT equipment are (in addition to this grid-control
Structure other than radiographic source) and operation principle be the prior art, details are not described herein.
Face provided by the present invention battle array multifocal grid-control radiographic source and its CT equipment are described in detail above.It is right
For those of ordinary skill in the art, it is done under the premise of without departing substantially from true spirit any apparent
Change, will all belong to the protection domain of patent right of the present invention.
Claims (12)
1. a kind of face battle array multifocal grid-control radiographic source, it is characterised in that including shell, filament supply, grid are provided in the shell
Control power supply and multiple X-ray tubes, the filament supply are connect with the cathode of the X-ray tube respectively, the grid-control power supply difference
Grid-control with the X-ray tube, which switchs, to be connected；
The filament supply is used to make the cathode of each X-ray tube to generate the electronics for meeting preset quantity, the grid-control electricity
Source is used to control the grid-control switch of each X-ray tube so that the electron beam that the X-ray tube cathode surface generates is according to pre-
If rule, which bombards corresponding anode, generates X-ray, the multiple focuses arranged according to default spread geometry are formed.
2. battle array multifocal grid-control radiographic source in face as described in claim 1, it is characterised in that：
Each X-ray tube includes vacuum cavity, anode assemblies, cathode assembly and grid-control switch；The anode assemblies and
The cathode assembly is packaged in the inside of the vacuum cavity, and the anode assemblies are located at one end of the vacuum cavity,
The cathode assembly is located at the other end of the vacuum cavity, and the grid-control switch is arranged in the anode assemblies and the cathode
Between component, and close to the cathode assembly.
3. battle array multifocal grid-control radiographic source in face as claimed in claim 2, it is characterised in that：
The anode assemblies surface is provided with transmission anode target, the gold that the transmission anode target is high using atomic number, fusing point is high
Belong to material to be made.
4. battle array multifocal grid-control radiographic source in face as claimed in claim 3, it is characterised in that：
The cathode assembly includes focus mask and cathode filament, and the cathode filament is arranged inside the focus mask, described the moon
Pole filament is connect with the filament supply, and the filament supply is connect with external high pressure power supply.
5. battle array multifocal grid-control radiographic source in face as claimed in claim 4, it is characterised in that：
Be provided on the position of the focus mask face anode target surface power supply beamlet by opening.
6. battle array multifocal grid-control radiographic source in face as described in claim 1, it is characterised in that：
There is no other interference X-rays to generate in the exposure interval of continuous two X-ray tubes of the grid-control radiographic source.
7. battle array multifocal grid-control radiographic source in face described in claim 1, it is characterised in that：
The X-ray tube is arranged on one or more ray pipe holders, and is fixed on outside described by the ray pipe holder
Predeterminated position inside shell.
8. battle array multifocal grid-control radiographic source in face as claimed in claim 7, it is characterised in that：
Multiple through-holes are provided on the ray pipe holder, the anode of multiple X-ray tubes is respectively from the corresponding through-hole
Middle stretching, and be separately fixed on the ray pipe holder.
9. battle array multifocal grid-control radiographic source in face as claimed in claim 8, it is characterised in that：
According to the default spread geometry of the multiple focuses and the focus that are formed needed for the grid-control radiographic source, penetrated described in adjustment
The shape of spool holder, the position of the through-hole and each X-ray tube anode are the distance between to the ray pipe holder.
10. battle array multifocal grid-control radiographic source in face as described in claim 1, it is characterised in that：
Coolant is filled in the interval of each X-ray tube, for realizing the heat dissipation to the grid-control radiographic source；The cooling
Agent includes but not limited to transformer oil or sulfur hexafluoride gas.
11. battle array multifocal grid-control radiographic source in face as described in claim 1, it is characterised in that：
The X-ray tube includes but not limited to the X-ray tube of plus earth type, the X-ray tube of minus earth type or neutral point
The X-ray tube of earthing type.
12. a kind of CT equipment, it is characterised in that penetrated including the face battle array multifocal grid-control described in any one of claim 1~11
Line source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690692.5A CN108811287B (en) | 2018-06-28 | 2018-06-28 | Area array multi-focus grid-control ray source and CT equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690692.5A CN108811287B (en) | 2018-06-28 | 2018-06-28 | Area array multi-focus grid-control ray source and CT equipment thereof |
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| CN108811287A true CN108811287A (en) | 2018-11-13 |
| CN108811287B CN108811287B (en) | 2024-03-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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