CN206453780U - C-arm X-ray production apparatus automatic exposure control device - Google Patents
C-arm X-ray production apparatus automatic exposure control device Download PDFInfo
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- CN206453780U CN206453780U CN201621223152.9U CN201621223152U CN206453780U CN 206453780 U CN206453780 U CN 206453780U CN 201621223152 U CN201621223152 U CN 201621223152U CN 206453780 U CN206453780 U CN 206453780U
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Abstract
The utility model discloses a kind of C-arm X-ray production apparatus automatic exposure control device, image is gathered according to the exposure parameter of setting, analysis image makes the adjustment of exposure parameter, resurvey image, collection rapidly, continuously and regulation process can be realized by such a control device, optimal exposure parameter and locking is exported automatically in a short time.The auto-exposure control during C-arm X-ray production apparatus use can be achieved, it is to avoid artificial setting relevant exposure parameter, mitigate doctor's burden, reduce operation risk.The utility model can realize the diagnostic image uniformity for different building shape sufferer different parts, and on the premise of diagnostic imaging quality is met, by the control of ray radiation level in minimum, reduction doctors and patients' radiation risk.
Description
Technical field
The utility model is related to technical field of medical instruments, more particularly to a kind of C-arm X-ray production apparatus auto-exposure control dress
Put.
Background technology
In medical field, X-ray is widely used in medical diagnosis, especially carries out hurtless measure to the situation in patient's body
Diagnosis.
X-ray can penetrate human body to image device and ultimately generate absorption of the different tissues to X-ray in diagnostic image, human body
Intensity is different, therefore penetrates human body and reach that the X-ray of image device has quantitative difference, and this species diversity can cause diagnostic graph
Gray difference as in, so as to help doctor to be diagnosed.
Excessive X-ray can be damaged to human body for a long time, therefore human body be received during medical diagnosis
The exposure dose of X-ray carry out strict control.
Several kinds of medical equipment has used X-ray, including：CR, DR, CT, linear accelerator, C-arm X-ray production apparatus etc..Wherein
CR, DR, CT, linear accelerator are disposably exposed according to the program pre-set, therefore exposure dose is relative
It is controllable, and only patient can be exposed radiation, and doctor is in security isolation region.Set in the medical treatment of all use X-rays
In standby, C-arm X-ray production apparatus is unique equipment used in situations in the surgery room, and is needed during equipment use by doctor scene
Operate, therefore doctors and patients are both needed to be exposed in X-ray, the complexity performed the operation when using according to sufferer need to carry out multiple X for a long time
Radiation exposure.Therefore, the demand controlled for roentgen dose X, requires very high to the spectrum assignment of C-arm X-ray production apparatus.
The parameter of medical diagnosis X-ray mainly has：Voltage kV, electric current mA, time for exposure s, these three parameters determine X
The light exposure of ray, also determines the quality of last diagnostic image.Voltage kV determines the matter of ray, i.e. penetration capacity, necessarily
The contrast of image can be influenceed in degree, and electric current mA and time for exposure s determine the amount of ray, i.e. quantity, can influence
The shading value of image.Picture quality effect need to meet diagnosis demand.
Spectrum assignment key difficulties have two：
1. diagnostic image uniformity, the i.e. different parts for different building shape sufferer, the diagnostic image of generation should be as far as possible
Being consistent property.
2. low dosage, i.e., on the premise of ensureing that generation image meets diagnosis requirement, as far as possible by ray radiation level
Control is minimum.
Equipment component does not have Control Technique for Automatic Exposure, it is necessary to which doctor or technician are for patient's build and check point thickness
Etc. concrete condition, the parameter such as regulation voltage kV, electric current mA, time for exposure s, rule of thumb generates diagnostic image manually.May
Because the wrong parameter that doctor's misoperation or technical experience deficiency are set causes diagnostic image problematic, Reparametrization is again
Exposure not only increases operating time, aggravates patient's risk, and also adds additional doctors and patients' x-ray dose.
Existing equipment has a variety of Control Technique for Automatic Exposure, and technological layer is mainly divided to two kinds：1. use the automatic of ionisation chamber
Exposure control technic.Using gaseous state or solid-state ionisation chamber, preamplifier is coordinated to realize the accurate measurement to x-ray dose, when
Pass through the transmitting of circuit instantaneous interruption X-ray when dosage reaches setting value.2. the photomultiplier controlled using fluorescent effect.Will
Roentgen dose X is converted into voltage (or electric current), and the voltage after time integral is proportional to x-ray dose, is set when integral voltage reaches
By circuit instantaneous trip high pressure during fixed voltage, auto-exposure control is realized.
The shortcoming of existing Control Technique for Automatic Exposure is can only to automatically adjust electric current mA and time for exposure s the two parameters,
Voltage kV parameters can not be automatically adjusted, that is to say, that also needed to when actual use by artificial selection sufferer build (child, it is thin,
It is medium, fat, super fat) carry out the indirect approximate range for determining voltage kV.
The content of the invention
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of C-arm X-ray production apparatus certainly
Dynamic exposure-control device, to improve the stability and accuracy of spectrum assignment, the amount of radiation that reduction doctors and patients are subject to reduces operation wind
Danger.
The purpose of this utility model is achieved through the following technical solutions.
A kind of C-arm X-ray production apparatus automatic exposure control device, including：X-ray detector, grid, image workstation,
High voltage control plate, inverter, high pressure generator, bulb, beam-defining clipper, the X-ray detector pass through gigabit network cable connection figure picture
Work station, high voltage control plate is connected by signal wire；Described image work station connects high voltage control plate by Serial Port Line；The limit
Beam device is connected by signal wire with high voltage control plate, and beam-defining clipper masks unnecessary X by the window of an adjustable size
Ray, and the scattered rays leaked at bulb can be shielded；The high voltage control plate connects high pressure generator by cable, passes through
Cable connects bulb；The high pressure generator connects bulb by positive and negative two high-voltage cables；The X-ray of bulb transmitting is led to
Cross after sufferer and to be received and be imaged by X-ray detector, high pressure generator is connected by signal wire with inverter, inverter passes through letter
Number line and the connection of high voltage control plate, complete the transformation of direct current and alternating current；Grid is used for the scattered rays for filtering X-ray, with X
Ray detector is close together, wherein bulb, and high pressure generator, and inverter together form X-ray generator, the dress
Put and controlled by high voltage control plate, high voltage control plate is again by image work stand control, and image workstation calculates one group of exposure parameter
When, X-ray generator can generate X-ray according to this exposure parameter, and a part can be produced while X-ray penetrates sufferer and is dissipated
Ray, the scattered rays can reduce picture quality, be filtered out with grid, and final X-ray reaches X-ray detector formation digitized map
Picture, image is sent to image workstation by netting twine and is handled and analyzed；The exposure ginseng of described image work station loading acquiescence
Number, is issued to the high voltage control plate, the high voltage control plate is started by cable by the exposure parameter by Serial Port Line
Rotary anode in the bulb, exposes ready；Then the high voltage control plate sends the exposure instruction control high pressure
Generator produces the high pressure matched with the exposure parameter, and high pressure is sent to described by the high pressure generator by high-tension cable
While bulb, X-ray is launched from the bulb, is penetrated the sufferer and is arrived at the X-ray detector；At the same time,
High voltage control plate sends trigger signal to the X-ray detector by signal wire, and the X-ray detector penetrates the X arrived at
Line is converted to digital picture and is sent to described image work station by gigabit network cable；The analysis of described image work station is received
Image simultaneously adjusts exposure instruction, and repeats above procedure, described when image meets certain requirements and no longer adjusts exposure instruction
Image workstation locks last group of exposure parameter, and completes auto-exposure control process.
It is preferred that, the X-ray detector is X-ray flat panel detector,
It is preferred that, the X-ray detector is that x ray image intensifier or other X-rays are received and conversion equipment.
It is preferred that, described image work station is computer.
It is preferred that, described image work station is embedded system or the digital display circuit of framework.
Compared with prior art, the technical solution of the utility model has advantages below：
1st, the utility model can realize the auto-exposure control during C-arm X-ray production apparatus use, it is to avoid manually set phase
Exposure parameter is closed, mitigates doctor's burden, operation risk is reduced.
2nd, the utility model can realize the diagnostic image uniformity for different building shape sufferer different parts, and meet
On the premise of diagnostic imaging quality, by the control of ray radiation level in minimum, reduction doctors and patients' radiation risk.
Brief description of the drawings
Fig. 1 is apparatus structure schematic diagram of the present utility model.
Fig. 2 is system structure diagram of the present utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
Refer to shown in Fig. 1, C-arm X-ray production apparatus automatic exposure control device described in the utility model is specifically included：X is penetrated
Line detector 100, grid 800, image workstation 200, high voltage control plate 300, inverter 700, high pressure generator 400, ball
Pipe 500, beam-defining clipper 900, the X-ray detector 100 connect image workstation 200 by gigabit network cable, are connected by signal wire
Connect high voltage control plate 300；Described image work station 200 connects high voltage control plate 300 by Serial Port Line；The beam-defining clipper 900 leads to
Cross signal wire to be connected with high voltage control plate, beam-defining clipper 900 is masked unnecessary X and penetrated by the window of an adjustable size
Line, and the scattered rays leaked at bulb can be shielded；The high voltage control plate 300 connects high pressure generator 400 by cable,
Bulb 500 is connected by cable；The high pressure generator 400 connects bulb 500 by positive and negative two high-voltage cables.Bulb
500 transmitting X-rays by being received and being imaged by X-ray detector 100 after sufferer 600, high pressure generator by signal wire with
Inverter 700 is connected, and inverter 700 is connected by signal wire and high voltage control plate, completes the transformation of direct current and alternating current；Its
Middle grid 800 is used for the scattered rays for filtering X-ray, is close together with X-ray detector 100, sufferer 600 is used only to auxiliary
The explanation C-arm X-ray production apparatus automatic exposure control device is helped, and is not belonging to the component of the control device in itself.
The course of work of the C-arm X-ray production apparatus automatic exposure control device is as follows：Bulb, high pressure generator, and inversion
Device together form X-ray generator, and the device is controlled by high voltage control plate, and high voltage control plate is again by image workstation control
System, when image workstation calculates one group of exposure parameter, X-ray generator can generate X-ray, X according to this exposure parameter
Ray can produce a part of scattered rays while penetrating sufferer, and the scattered rays can reduce picture quality, it is therefore desirable to use grid
Filter out, final X-ray reaches X-ray detector formation digital picture, image is sent to image workstation by netting twine and carried out
Processing and analysis.The exposure parameter of the loading acquiescence of described image work station 200, the exposure parameter is issued to by Serial Port Line
The high voltage control plate 300, the high voltage control plate 300 starts the rotary anode in the bulb 500 by cable, exposure
It is ready；Then the high voltage control plate 300 sends the exposure instruction control high pressure generator 400 and produced and the exposure
The high pressure of parameter matching, while high pressure is sent to bulb 500 by the high pressure generator 400 by high-tension cable, X is penetrated
Line is launched from the bulb 500, penetrates the sufferer 600 and arrives at the X-ray detector 100；At the same time, it is high voltage-controlled
Making sheet 300 sends trigger signal to the X-ray detector 100 by signal wire, and the X-ray detector 100 is by the X arrived at
Ray is converted to digital picture and is sent to described image work station 200 by gigabit network cable；Described image work station 200 is analyzed
The image that receives simultaneously adjusts exposure instruction, and repeat above procedure, no longer adjusts exposure when image meets certain requirements and refers to
When making, described image work station 200 locks last group of exposure parameter, and completes auto-exposure control process.
The X-ray detector 100 can be X-ray flat panel detector or x ray image intensifier or its
Its X-ray is received and conversion equipment.
Described image work station 200 can be computer or embedded system or the similar digital display circuit of framework.
The corresponding control method of above-mentioned C-arm X-ray production apparatus automatic exposure device, is specifically included：
Step 210：Initialization step, wherein hardware is initialized, and it is related to voltage associated adjustment value, electric current
Regulated value is initialized；
Step 220：Voltage adjustment step, wherein being updated regulation to voltage；
Step 230：Electric current regulating step, wherein being updated regulation to electric current；
Step 240：Gain-adjusted step：Regulation is wherein updated to gain；
Step 250：Parameter exports step：Wherein voltage, electric current, gain and the large and small focus of bulb are configured simultaneously
Exported.
In the step 210, initialization is specifically included：
Step 211：Hardware initialization；
Step 212：Initialization voltage adjusts brightness Ev, electric current regulation brightness Ec；
Step 213：Initialization voltage adjusts threshold value Tv, electric current regulation threshold value Tc, gain-adjusted threshold value Tg；
Step 214：Initialization voltage adjusts step-length Sv, electric current regulation step-length Sc, gain adjuster step Sg；
Step 215：Initialization voltage kV, electric current mA, gain gain；
Step 216：Initialization is completed.
Wherein, brightness Ev and Ec, threshold value Tv, Tc and Tg, step-length Sv, Sc and Sg, voltage kV, electric current mA, gain gain are equal
It is configured by engineer in installation and debugging equipment.
In the step 220, voltage-regulation includes：
Step 221：Set voltage kV, electric current mA；
Step 222：Obtain ray image img；
Step 223：Obtain interesting image regions average gray value avg=mean (img (roi))；
Step 224：Calculate deviation comp=1-avg/Ev；
Step 225：Comp ＜ Tv are compared, if it is not, 226 are then jumped to, if so, then jumping to 227；
Step 226：Voltage kV=kV+Sv*comp is updated, 221 are then branched to；
Step 227：Voltage-regulation is completed, storage current voltage kV.
In the step 230, electric current regulation is specifically included：
Step 231：Set voltage kV, electric current mA；
Step 232：Obtain ray image img；
Step 233：Obtain interesting image regions average gray value avg=mean (img (roi))；
Step 234：Calculate deviation comp=1-avg/Ec；
Step 235：Comp ＜ Tc are compared, if it is not, 236 are then jumped to, if so, then jumping to 237；
Step 236：Electric current mA=mA+Sc*comp is updated, 231 are then branched to；
Step 237：Electric current regulation is completed, storage current flow mA.
In the step 240, gain-adjusted is specifically included：
Step 241：Set voltage kV, electric current mA, setting gain gain；
Step 242：Obtain ray image img；
Step 243：Calculate Image Warping contrast=sdev (img)；
Step 244：Calculate the horizontal noise of picture noise
Step 245：Contrast/noise ＞ Tg are compared, if so, 246 are then jumped to, if it is not, then jumping to 247；
Step 246：Yield value gain=gain+Sg is updated, and updates mA=mA/10^ (Sg/10), is then branched to
241；
Step 247：Gain-adjusted is completed, and stores current gain gain and electric current mA.
In the step 250, parameter output is specifically included：
Step 251：Set up connection；
Step 252：Voltage kV, electric current mA are set；
Step 253：Gain gain is set；
Step 254：The large and small focus of bulb is set；
Step 255：Output is completed.
It is corresponding with above-mentioned C-arm X-ray production apparatus automatic exposure control method, as shown in Fig. 2 a kind of C-arm X of the utility model
X-ray machine X automatic exposure control system, including：
Initialization module (210 '), is adjusted for being initialized to hardware, and to voltage associated adjustment value, electric current correlation
Section value is initialized；
VRM Voltage Regulator Module (220 '), for being updated regulation to voltage；
Current regulating module (230 '), for being updated regulation to electric current；
Gain adjustment module (240 '), for being updated regulation to gain；
Parameter output module (250 '), for voltage, electric current, gain and the large and small focus of bulb to be configured and gone forward side by side
Row output.
Initialization wherein in initialization module (210 ') is specifically included：
211’：Hardware initialization；
212’：Initialization voltage adjusts brightness Ev, electric current regulation brightness Ec；
213’：Initialization voltage adjusts threshold value Tv, electric current regulation threshold value Tc, gain-adjusted threshold value Tg；
214’：Initialization voltage adjusts step-length Sv, electric current regulation step-length Sc, gain adjuster step Sg；
215’：Initialization voltage kV, electric current mA, gain gain；
216’：Initialization is completed.
Wherein, brightness Ev and Ec, threshold value Tv, Tc and Tg, step-length Sv, Sc and Sg, voltage kV, electric current mA, gain gain are equal
It is configured by engineer in installation and debugging equipment.
The VRM Voltage Regulator Module (220 ') is updated regulation to current value and specifically included：
221’：Set voltage kV, electric current mA；
222’：Obtain ray image img；
223’：Obtain interesting image regions average gray value avg=mean (img (roi))；
224’：Calculate deviation comp=1-avg/Ev；
225’：Comp ＜ Tv are compared, if it is not, 226 ' are then jumped to, if so, then jumping to 227 '；
226’：Voltage kV=kV+Sv*comp is updated, 221 ' are then branched to；
227’：Voltage-regulation is completed, storage current voltage kV.
Wherein, roi represents area-of-interest, and mean represents to seek arithmetic mean of instantaneous value.
The current regulating module (230 ') specifically includes：
231’：Set voltage kV, electric current mA；
232’：Obtain ray image img；
233’：Obtain interesting image regions average gray value avg=mean (img (roi))；
234’：Calculate deviation comp=1-avg/Ec；
235’：Comp ＜ Tc are compared, if it is not, 236 ' are then jumped to, if so, then jumping to 237 '；
236’：Electric current mA=mA+Sc*comp is updated, 231 ' are then branched to；
237’：Electric current regulation is completed, and stores current flow mA values.
Wherein, roi represents area-of-interest, and mean represents to seek arithmetic mean of instantaneous value.
The gain adjustment module (240 ') is updated regulation to yield value and specifically included：
241’：Set voltage kV, electric current mA, setting gain gain；
242’：Obtain ray image img；
243’：Calculate Image Warping contrast=sdev (img)；
244’：Calculate the horizontal noise of picture noise
245’：Contrast/noise ＞ Tg are compared, if so, 246 ' are then jumped to, if it is not, then jumping to 247 '；
246’：Yield value gain=gain+Sg is updated, and updates mA=mA/10^ (Sg/10), 241 ' are then branched to；
247’：Gain-adjusted is completed, and stores current gain gain and electric current mA.
Wherein, sdev represents to seek standard variance, and gain gain unit is dB.
The parameter output module is specifically included：
251’：Set up connection；
252’：Voltage kV, electric current mA are set；
253’：Gain gain is set；
254’：The large and small focus of bulb is set；
255’：Output is completed.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modifications, equivalent substitutions and improvements made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of C-arm X-ray production apparatus automatic exposure control device, it is characterised in that including：X-ray detector (100), filter line
Grid, image workstation (200), high voltage control plate (300), inverter, high pressure generator (400), bulb (500), beam-defining clipper, institute
State X-ray detector (100) and image workstation (200) is connected by gigabit network cable, high voltage control plate is connected by signal wire
(300)；Described image work station (200) connects high voltage control plate (300) by Serial Port Line；The beam-defining clipper by signal wire with
High voltage control plate is connected, and beam-defining clipper masks unnecessary X-ray, and can shield by the window of an adjustable size
The scattered rays leaked at bulb；The high voltage control plate (300) connects high pressure generator (400) by cable, passes through cable
Line connection bulb (500)；The high pressure generator (400) connects bulb (500) by positive and negative two high-voltage cables；Bulb
(500) X-ray of transmitting is by being received and being imaged by X-ray detector (100) after sufferer (600), and high pressure generator passes through letter
Number line is connected with inverter, and inverter passes through signal wire and high voltage control plate is connected, and completes the transformation of direct current and alternating current；Filter
Wiregrating (700) is used for the scattered rays for filtering X-ray, is close together with X-ray detector (100), wherein bulb, high pressure occurs
Device, and inverter together form X-ray generator, and the device is controlled by high voltage control plate, and high voltage control plate is again by image
Work stand control, and image workstation calculates one group of exposure parameter, and X-ray generator can generate X according to this exposure parameter
Ray, can produce a part of scattered rays while X-ray penetrates sufferer, the scattered rays can reduce picture quality, use grid mistake
Filter, final X-ray reaches X-ray detector formation digital picture, image is sent at image workstation by netting twine
Reason and analysis；The exposure parameter of described image work station (200) loading acquiescence, the exposure parameter is issued to by Serial Port Line
The high voltage control plate (300), the high voltage control plate (300) starts the rotation sun in the bulb (500) by cable
Pole, exposes ready；Then the high voltage control plate (300) sends exposure instruction control high pressure generator (400) production
High pressure is sent to the ball by the raw high pressure matched with the exposure parameter, the high pressure generator (400) by high-tension cable
While managing (500), X-ray is launched from the bulb (500), is penetrated the sufferer and is arrived at the X-ray detector
(100)；At the same time, high voltage control plate (300) sends trigger signal to the X-ray detector (100), institute by signal wire
X-ray detector (100) is stated the X-ray arrived at is converted into digital picture and described image work is sent to by gigabit network cable
Stand (200)；Described image work station (200) analyzes the image received and adjusts exposure instruction, and repeats, and is wanted when image is met
Ask, described image work station (200) locks last group of exposure parameter, complete automatic exposure.
2. C-arm X-ray production apparatus automatic exposure control device as claimed in claim 1, it is characterised in that the X-ray detection
Device is X-ray flat panel detector or X-ray booster.
3. C-arm X-ray production apparatus automatic exposure control device as claimed in claim 2, it is characterised in that described image work station
It is the digital display circuit of computer, embedded system or framework.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106419944A (en) * | 2016-11-09 | 2017-02-22 | 深海精密科技（深圳）有限公司 | Control method, control system and control device of auto-exposure of C-arm X-ray machine |
| CN108742780A (en) * | 2018-07-12 | 2018-11-06 | 深圳市新元素医疗技术开发有限公司 | A kind of X-ray automatic control device |
| CN108965084A (en) * | 2018-07-30 | 2018-12-07 | 南京普爱医疗设备股份有限公司 | A kind of bus type X-ray control system |
| CN114305462A (en) * | 2021-12-24 | 2022-04-12 | 深圳市艾克瑞电气有限公司 | 0-point automatic exposure control method and system for medical X-ray equipment |
-
2016
- 2016-11-09 CN CN201621223152.9U patent/CN206453780U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106419944A (en) * | 2016-11-09 | 2017-02-22 | 深海精密科技（深圳）有限公司 | Control method, control system and control device of auto-exposure of C-arm X-ray machine |
| CN108742780A (en) * | 2018-07-12 | 2018-11-06 | 深圳市新元素医疗技术开发有限公司 | A kind of X-ray automatic control device |
| CN108965084A (en) * | 2018-07-30 | 2018-12-07 | 南京普爱医疗设备股份有限公司 | A kind of bus type X-ray control system |
| CN114305462A (en) * | 2021-12-24 | 2022-04-12 | 深圳市艾克瑞电气有限公司 | 0-point automatic exposure control method and system for medical X-ray equipment |
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