CN208926396U - X-ray exposure control system - Google Patents
X-ray exposure control system Download PDFInfo
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- CN208926396U CN208926396U CN201821154262.3U CN201821154262U CN208926396U CN 208926396 U CN208926396 U CN 208926396U CN 201821154262 U CN201821154262 U CN 201821154262U CN 208926396 U CN208926396 U CN 208926396U
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Abstract
A kind of X-ray exposure control system, comprising: high pressure generator, for exporting X-ray to flat panel detector, high pressure generator includes exposure sync interface, and exposure sync interface transmits for realizing the signal between high pressure generator and flat panel detector；Flat panel detector, for receiving X-ray, and image digital signal is exported to computer, output control signals to high pressure generator, flat panel detector includes AEC module and AED module, AED module exports enabling signal to AEC module after detecting X-ray, and AEC module stops exposure for controlling high pressure generator；Exposure sync interface is electrically connected with flat panel detector by exposure sync line.The utility model starts AEC module by AED module, avoid the problem of AEC harness must being used to connect between AEC module and high pressure generator, optimize system, realize Digital Control, AEC function is realized using the exposure sync interface of high pressure generator, is conducive to the Miniaturization Design of high pressure generator.
Description
Technical field
The utility model relates to a kind of X-ray exposure control systems, belong to technical field of medical equipment.
Background technique
AEC (auto-exposure control) technology is widely used in the general place system of X-ray, and principle is connect using devices such as ionisation chambers
The visible light of X-ray or X-ray conversion is received, and is converted into electric signal, AEC module does Integral Processing to electric signal, with exposure
The voltage value of the increase of time, accumulation increases, and when reaching some threshold voltage, AEC module controls high pressure generator and stops
Exposure.Fig. 1 is the schematic illustration of AEC technology in the prior art, is exposed as shown in Figure 1, high pressure generator 10 controls bulb 11
The transmitting of ray (X-ray) after exposed radiation passes through subject, is received by detector 20 to generate exposure image and export to electricity
Brain 40.Wherein, between subject and detector 20 be equipped with AEC module 30, the AEC module 30 by AEC control line 31 with
AEC interface 12 on high pressure generator 10 connects, so that controlling high pressure generator stops exposure.
Currently, existing AEC technology has the following problems.Firstly, the production of ionisation chamber is complicated, cost is very high.Secondly, by
Connecting communication is needed between AEC module and high pressure generator, AEC module needs dedicated AEC harness that could use, and high pressure occurs
Device has to band AEC interface, is unfavorable for the Miniaturization Design of high pressure generator, and high pressure generator output control signal controls AEC
Module is started to work, and AEC module exports analog signal control high pressure generator and stops exposure, and analog signal is in long distance transmission
Shi Rongyi decays and is interfered, and influences the accuracy and reliability automatically controlled.Finally, AEC module and flat panel detector point
From greatly limiting usage scenario.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiencies of the prior art, provide a kind of X-ray exposure
Control system may be implemented to integrate AEC module and AED module in flat panel detector, starts AEC module by AED module, avoids
The problem of AEC harness must being used to connect between AEC module and high pressure generator, system is optimized, realizes digitlization control
System；The analog signal that AEC module exports is converted into digital signal using analog-to-digital conversion module, has prevented remote analog signal
Transmit signal decaying and vulnerable to interference the problem of；AEC function is realized using the exposure sync interface of high pressure generator, is conducive to
The Miniaturization Design of high pressure generator.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of X-ray exposure control system, the X-ray exposure control system includes: high pressure generator, for exporting X
For ray to flat panel detector, the high pressure generator includes exposure sync interface, and the exposure sync interface is for realizing high pressure
Signal transmission between generator and flat panel detector；Flat panel detector for receiving X-ray, and exports image digital signal
To computer, high pressure generator is output control signals to, the flat panel detector includes AEC module and AED module, the AED mould
Block exports enabling signal to AEC module after detecting X-ray, and the AEC module stops exposure for controlling high pressure generator；
Wherein, the exposure sync interface is electrically connected with flat panel detector by exposure sync line.
In order to export enabling signal, the AED module includes illuminant module and processing module, and the illuminant module includes dodging
Bright body and AED photodiode, the scintillator are used to after X-ray to be converted to visible light signal export to two pole of AED photoelectricity
Pipe, the AED photodiode export after optical signal is converted to electric signal to processing module for will be seen that；The processing module
Including pre-amplifier, post-amplifier and hysteresis comparator.
The AEC module includes integral and conditioning circuit, ionisation chamber/AEC photodiode, analog-to-digital conversion module, described
Analog-to-digital conversion module is used to the analog signal that integral and conditioning circuit issue being converted to digital signal.
Preferably, isolator is equipped between the AEC module and high pressure generator.
Preferably, the exposure sync interface inputs for two-way input interface or all the way output interface all the way.
In conclusion the utility model may be implemented to integrate AEC module and AED module in flat panel detector, pass through AED mould
Block starts AEC module, avoids between AEC module and high pressure generator the problem of AEC harness must being used to connect, and optimizes and is
System, realizes Digital Control；The analog signal that AEC module exports is converted into digital signal using analog-to-digital conversion module, is shut out
Analog signal transmission signal decaying remote absolutely and the problem of vulnerable to interference；Utilize the exposure sync interface of high pressure generator
It realizes AEC function, is conducive to the Miniaturization Design of high pressure generator.
In the following with reference to the drawings and specific embodiments, the technical solution of the utility model is described in detail.
Detailed description of the invention
Fig. 1 is the schematic illustration of AEC technology in the prior art；
Fig. 2 is the schematic illustration of the utility model X-ray exposure control system；
Fig. 3 is the block diagram of processing module in the utility model AED module；
Fig. 4 is AED preamplifying circuit schematic diagram in the utility model AED resume module module；
Fig. 5 is the block diagram of the utility model AEC module；
Fig. 6 is the integrating circuit figure of the utility model AEC module；
Fig. 7 is the integration sequence figure of the utility model AEC module；
Fig. 8 is the working timing figure one of the utility model X-ray exposure control system；
Fig. 9 is the working timing figure two of the utility model X-ray exposure control system；
Figure 10 is the work flow diagram of the utility model X-ray exposure control system.
Specific embodiment
Fig. 2 is the schematic illustration of the utility model X-ray exposure control system.As shown in Fig. 2, the utility model provides
A kind of X-ray exposure control system, the X-ray exposure control system include high pressure generator 100, flat panel detector 200.
The high pressure generator 100 (High Voltage Generator, abbreviation HVG) includes bulb 110, for exporting
X-ray is to flat panel detector 200.The high pressure generator 100 further includes exposure sync interface 120, the exposure sync interface
120 are electrically connected with flat panel detector 200, pass for realizing the signal between high pressure generator 100 and flat panel detector 200
It is defeated, to control high pressure generator exposure cut-off.Specifically, the exposure sync interface 120 passes through exposure with flat panel detector 200
Phototiming line is electrically connected.
The flat panel detector 200 (Flat Panel Detector, abbreviation FPD) exports figure for receiving X-ray
Picture digital signal outputs control signals to high pressure generator 100 and (is passed by exposure sync line to computer (passing through network cable transmission)
It is defeated).The flat panel detector 200 includes X ray image detecting module, and the X ray image detecting module includes scintillator layers,
Amorphous silicon photodiodes array (or amorphous silicon film transistor array), horizontal drive circuit and picture signal reading circuit.
Scintillator layers (cesium iodide scintillation crystal, x-ray fluorescence body etc.) positioned at flat panel detector 200 can be by incident X ray picture
As being converted to visible images, the amorphous silicon photodiodes array under scintillator layers can will be seen that light image is converted to
Charge image, horizontal drive circuit and picture signal reading circuit export after charge image can be converted to digital signal to electricity
Brain.It should be noted that the structure of above-mentioned flat panel detector 200 is not used to limit the protection scope of the utility model, it is practical
Other types of detector also can be used in.
AEC module 210 and AED module 220 are additionally provided in the flat panel detector 200.The AED module 220 is detecting
Enabling signal is exported after to X-ray to AEC module 210, the AEC module 210 is in the starting letter for receiving the output of AED module 220
After number, start to work.
The AED module 220 includes illuminant module and processing module.The illuminant module includes scintillator and AED photoelectricity
X-ray is converted to after visible light signal output to AED photodiode by diode, the scintillator, later two pole of AED photoelectricity
Pipe is it will be seen that optical signal exports after being converted to electric signal to processing module.Specifically, scintillator and AED photodiode can be with
Being wholely set can also be independently arranged, and when scintillator and AED photodiode are independently arranged, need on flat panel detector 200
Corresponding scintillator opens up aperture, so that the visible light signal that scintillator issues is received by AED photodiode；When scintillator and
When AED photodiode is wholely set, i.e., the AED photodiode of scintillator, nothing on flat panel detector 200 are had using surface
Aperture need to be opened up.Fig. 3 is the block diagram of processing module in the utility model AED module；Fig. 4 is the utility model AED resume module
AED preamplifying circuit schematic diagram in module.As shown in Figure 3 and Figure 4, the processing module includes that pre-amplifier, rear class are put
Big device and hysteresis comparator, X-ray are converted to visible light signal by scintillator (not shown), and photodiode D2 reception can
Electric signal is converted thereof into after light-exposed signal, amplifies the signal using pre-amplifier and post-amplifier, then enters back into
Hysteresis comparator, and the threshold value comparison being preset in hysteresis comparator, signal is when greater than threshold value, hysteresis comparator exports high level
Enabling signal to AEC module 210, the judgement of AED module detects X-ray, indicates X-ray exposure.
Fig. 5 is the block diagram of the utility model AEC module 210.As shown in figure 5, the AEC module 210 include ionisation chamber/
AEC photodiode, integral and conditioning circuit and analog-to-digital conversion module.
Wherein, the analog-to-digital conversion module includes analog-digital converter ADC and microprocessing unit, and the microprocessing unit can
Think FPGA (Field-Programmable Gate Array, i.e. field programmable gate array), ARM (Advanced RISC
Machines, arm processor) or MCU (Microcontroller Unit, micro-control unit) etc..The analog-to-digital conversion mould
The analog signal that integral and conditioning circuit issue can be converted to digital signal by block.
Since X-ray exposure control system is commonly used for medical product, high pressure generator 100 and plate are visited under normal circumstances
It surveys between device 200 and needs insulation blocking, therefore, isolator is equipped between the AEC module 210 and high pressure generator 100.It is described
Isolator includes optocoupler and solid-state relay.
The ionisation chamber/AEC photodiode for receiving X-ray, convert thereof into after electric signal output to integral and
Conditioning circuit.When using ionisation chamber, since ionisation chamber is designed using special material, X-ray passes through its decaying very little, because
This, the ionisation chamber can be set in flat panel detector 200 close to the side of bulb 110；When using AEC photodiode D1
When, it is small in size due to AEC photodiode, it can be set inside flat panel detector 200.It should be noted that AEC light
The surface of electric diode D1 has scintillator, and the utility model is not limited thereto, can also individually set in flat panel detector 200
Set scintillator.In the present invention, it is preferred to use AEC photodiode, since the production of ionisation chamber is complicated and costly,
Production cost can be effectively reduced using AEC photodiode, and the AEC photodiode setting of small volume is visited in plate
The volume that can reduce flat panel detector 200 in device 200 is surveyed, the portability of flat panel detector 200 is increased, it is user-friendly.
Fig. 6 is the integrating circuit figure of the utility model AEC module；Fig. 7 is the integration sequence of the utility model AEC module
Figure.As shown in Figure 6 and Figure 7, the integral and conditioning circuit are started to work after the enabling signal for receiving the output of AED module 220,
The electric signal that ionisation chamber/AEC photodiode issues is integrated and compared, with the increase of time for exposure, the electricity of accumulation
Pressure value increases, and when reaching some threshold value, AEC module 210 issues a level signal to flat panel detector 200.
Specifically, after AEC module 210 is started to work, microprocessing unit turns analog signal by analog-digital converter ADC
Change digital signal into, the digital signal is compared by flat panel detector 200 with AEC threshold value set by user, when the number
When word signal exceeds the AEC threshold value, AEC module 210 exports a level signal to flat panel detector 200.The level signal
Preferably Transistor-Transistor Logic level signal or CMOS level signal.
You need to add is that the utility model is not intended to limit ionisation chamber/AEC photodiode quantity, art technology
Can multiple ionisation chamber/AEC photodiodes be arranged in different positions according to actual needs in personnel, so that AEC module
210 can carry out detection integral to multiple regions.In the present embodiment, ionisation chamber/AEC photodiode quantity is 3.
The exposure sync interface 120 of the utility model mesohigh generator 100 is introduced below.
The exposure sync interface 120 can be two-way input interface (Prepare+Ready interface) or input all the way
Output interface (Requset+OK interface) all the way.
Traditional AEC wiring harness structure is more complicated, generally comprises power supply line, ground line, A Sensor selection line, B
Sensor selection line, C Sensor selection line and AEC analog signal line etc., and due to being connect with exposure sync in the utility model
Mouthfuls 120 replace traditional AEC interface, without AEC harness, only can realize high pressure generator 100 with exposure sync line
Signal transmission between flat panel detector 200.The exposure sync line is existing sync cap line, and details are not described herein.
Fig. 8 is the working timing figure one of the utility model X-ray exposure control system, as shown in figure 8, working as high pressure generator
When 100 exposure sync interface 120 is Prepare+Ready interface, the course of work of X-ray exposure control system is as follows:
Flat panel detector 200 is arranged in place according to the setting of the film making position of subject, user presses rim brake
Or after backpedalling brake, the bulb 110 of high pressure generator 100 enters preparation state (Prepare), after bulb is ready to complete, plate
Detector 200 exports a Ready signal and controls high pressure generator 100, and high pressure generator 100 starts to expose.
Enabling signal is exported after AED module 220 detects X-ray to AEC module 210, AEC module 210 is started to work.
Received X-ray is converted to Integral Processing after electric signal by AEC module 210, when the voltage value of accumulation reaches a threshold voltage,
AEC module 210 exports a level signal to flat panel detector 200, the control of the level signal and the Ready signal Xiang Yuhou
The exposed sync cap 120 of signal processed is transmitted to high pressure generator 100, to control the exposure cut-off of high pressure generator 100.It is another
The image digital signal that X ray image detecting module exports is sent to computer by aspect, to obtain required image, it is ensured that excellent
Elegant image effect.
Fig. 9 is the working timing figure two of the utility model X-ray exposure control system, as shown in figure 9, working as high pressure generator
When 100 exposure sync interface 120 is Requset+ok interface, the course of work of X-ray exposure control system is as follows:
Flat panel detector 200 is arranged in place according to the setting of the film making position of subject, user presses rim brake
Or after backpedalling brake, the bulb 110 of high pressure generator 100 enters preparation state, after bulb is ready to complete, high pressure generator 100
An exposure request (Requset) is exported to flat panel detector 200, after flat panel detector 200 is ready to complete, one OK signal of output is extremely
High pressure generator 100, high pressure generator 100 start to expose.You need to add is that the preparation of flat panel detector 200 refers to that plate is visited
Primary (acquisition but do not upload image) can be emptied before high pressure generator 100 exposes by surveying device 200, then etc. to be exposed, such as amorphous
Silicon flat panel detector need to be emptied periodically, can guarantee picture quality in this way.
Enabling signal is exported after AED module 220 detects X-ray to AEC module 210, AEC module 210 is started to work.
Received X-ray is converted to Integral Processing after electric signal by AEC module 210, when the voltage value of accumulation reaches a threshold voltage,
AEC module 210 exports a level signal to flat panel detector 200, the level signal and the OK signal phase and rear control and believes
Number exposed sync cap 120 is transmitted to high pressure generator 100, to control the exposure cut-off of high pressure generator 100.On the other hand
The image digital signal that X ray image detecting module exports is sent to computer, to obtain required image, it is ensured that outstanding
Image effect.
The utility model also provides a kind of control method applied in above-mentioned X-ray exposure control system, comprising:
S1: starting high pressure generator starts to expose；
Output enabling signal to AEC module, AEC module is started to work after S2:AED module detects X-ray；
S3: when the voltage value of accumulation reaches a threshold voltage, one control signal of flat panel detector output is raw to high pressure
Device, high pressure generator stop exposure.
One control signal of flat panel detector output is to the raw implement body of high pressure are as follows: integral in the AEC module and
Conditioning circuit issues analog signal, and the analog-to-digital conversion module in the AEC module converts analog signals into digital signal, plate
The digital signal is compared by detector with threshold voltage, when the digital signal exceeds the threshold voltage, AEC mould
Block exports a level signal to flat panel detector, flat panel detector by the level signal and Ready signal or OK signal phase with
The exposure sync interface of control signal access high pressure generator afterwards.
Further include S4 after S3: flat panel detector exports image digital signal to computer.
You need to add is that the utility model be not intended to limit flat panel detector by the level signal and Ready signal or
OK signal (being referred to as exposure signal) mutually with specific implementation, for example, it can be special by being arranged in flat panel detector
The processing module of door is realized, can also be realized by one gate circuit of setting.
Figure 10 is the work flow diagram of the utility model X-ray exposure control system.As shown in Figure 10, in the utility model
The course of work of X-ray exposure control system is as follows:
Flat panel detector 200 is arranged in place according to the setting of the film making position of subject, starts high pressure
Device 100 starts to expose.Enabling signal is exported after AED module 220 detects X-ray to AEC module 210, AEC module 210 is opened
Beginning work.Specifically, received X-ray is converted to Integral Processing after electric signal by AEC module 210, when the voltage value of accumulation
When reaching a threshold voltage, one control signal of the output of flat panel detector 200 controls high pressure by exposure sync interface 120
The exposure cut-off of device 100.The image digital signal that another aspect flat panel detector 200 exports X ray image detecting module is sent
To computer, to obtain required image, it is ensured that outstanding image effect.
In conclusion the utility model may be implemented to integrate AEC module and AED module in flat panel detector, pass through AED mould
Block starts AEC module, avoids between AEC module and high pressure generator the problem of AEC harness must being used to connect, and optimizes and is
System, realizes Digital Control；The analog signal that AEC module exports is converted into digital signal using analog-to-digital conversion module, is shut out
Analog signal transmission signal decaying remote absolutely and the problem of vulnerable to interference；Utilize the exposure sync interface of high pressure generator
It realizes AEC function, is conducive to the Miniaturization Design of high pressure generator.
Claims (5)
1. a kind of X-ray exposure control system, which is characterized in that the X-ray exposure control system includes:
High pressure generator (100), for exporting X-ray to flat panel detector (200), the high pressure generator includes exposure sync
Interface (120), the exposure sync interface (120) is for realizing between high pressure generator (100) and flat panel detector (200)
Signal transmission；
Flat panel detector (200) for receiving X-ray, and exports image digital signal to computer, outputs control signals to high pressure
Generator (100), the flat panel detector (200) include AEC module (210) and AED module (220), the AED module
(220) enabling signal is exported after detecting X-ray to AEC module (210), the AEC module (210) is for controlling high pressure
Raw device (100) stop exposure；
Wherein, the exposure sync interface (120) is electrically connected with flat panel detector (200) by exposure sync line.
2. X-ray exposure control system as described in claim 1, which is characterized in that the AED module (220) includes photosensitive
Module and processing module, the illuminant module include scintillator and AED photodiode, and the scintillator is used to turn X-ray
Output is to AED photodiode after being changed to visible light signal, and the AED photodiode is for it will be seen that optical signal is converted to electricity
It exports after signal to processing module；The processing module includes pre-amplifier, post-amplifier and hysteresis comparator.
3. X-ray exposure control system as described in claim 1, which is characterized in that the AEC module (210) includes integral
With conditioning circuit, ionisation chamber/AEC photodiode, analog-to-digital conversion module, the analog-to-digital conversion module will be for that will integrate and improve
The analog signal that circuit issues is converted to digital signal.
4. X-ray exposure control system as claimed in claim 3, which is characterized in that the AEC module (210) and high pressure
Isolator is equipped between raw device (100).
5. X-ray exposure control system as described in claim 1, which is characterized in that the exposure sync interface (120) is two
Road input interface inputs output interface all the way all the way.
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| CN201821154262.3U CN208926396U (en) | 2018-07-20 | 2018-07-20 | X-ray exposure control system |
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| CN201821154262.3U CN208926396U (en) | 2018-07-20 | 2018-07-20 | X-ray exposure control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109833051A (en) * | 2018-07-20 | 2019-06-04 | 上海煜影光电科技有限公司 | X-ray exposure control system and its control method |
| CN112206425A (en) * | 2020-10-13 | 2021-01-12 | 江苏瑞尔医疗科技有限公司 | Multi-flat-panel detector image acquisition system and image acquisition method thereof |
| CN116548992A (en) * | 2023-07-04 | 2023-08-08 | 深圳市宝润科技有限公司 | Synchronous control method, system, terminal and medium for mobile DR dynamic exposure |
-
2018
- 2018-07-20 CN CN201821154262.3U patent/CN208926396U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109833051A (en) * | 2018-07-20 | 2019-06-04 | 上海煜影光电科技有限公司 | X-ray exposure control system and its control method |
| CN109833051B (en) * | 2018-07-20 | 2024-10-15 | 上海煜影光电科技有限公司 | X-ray exposure control system and control method thereof |
| CN112206425A (en) * | 2020-10-13 | 2021-01-12 | 江苏瑞尔医疗科技有限公司 | Multi-flat-panel detector image acquisition system and image acquisition method thereof |
| CN116548992A (en) * | 2023-07-04 | 2023-08-08 | 深圳市宝润科技有限公司 | Synchronous control method, system, terminal and medium for mobile DR dynamic exposure |
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