CN108606804A - The automated calibration system and method and Medical Devices of auto-exposure control - Google Patents
The automated calibration system and method and Medical Devices of auto-exposure control Download PDFInfo
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- CN108606804A CN108606804A CN201611145079.2A CN201611145079A CN108606804A CN 108606804 A CN108606804 A CN 108606804A CN 201611145079 A CN201611145079 A CN 201611145079A CN 108606804 A CN108606804 A CN 108606804A
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- 238000004891 communication Methods 0.000 claims abstract description 40
- 238000004980 dosimetry Methods 0.000 claims abstract description 24
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- A—HUMAN NECESSITIES
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
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Abstract
The automated calibration system and method and Medical Devices of present invention offer auto-exposure control.Wherein, the automated calibration system of auto-exposure control includes：One X-ray bulb, for generating X-ray；One flat panel detector, for receiving the X-ray and generating an exposure image；One high pressure generator, for providing voltage for the X-ray bulb and including one first communication unit；And an image workstation, for receiving the exposure image and including one second communication unit；Wherein, it is communicated respectively by first communication unit and second communication unit between the high pressure generator and the image workstation, the image workstation counts the actual grey value of the exposure image and provides a feedback information to the high pressure generator, and the high pressure generator calibrates automatic exposure dosimetry parameter according to the feedback information.The present invention can realize the automatic calibration to Control Technique for Automatic Exposure, improve calibration accuracy and reduce the maintenance cost of system.
Description
Technical field
The present invention relates to Control Technique for Automatic Exposure field, the automated calibration system of especially a kind of auto-exposure control and
Method and Medical Devices.
Background technology
Auto-exposure control (Automatic Exposure Control, AEC) refers to reaching film or number by control
The x-ray dose of word detector obtains the imaging image quality of high quality.It is bent according to the photosensitive response of X-ray digital detector
Line, obtained image brilliance signal amplitude depend on the size of suffered X-ray radiation dosage, and dose of radiation is bigger, is obtained
The amplitude of image brilliance signal is bigger.When image brilliance signal amplitude reaches optimal imaging effect, terminate exposure, it will be able to obtain
Obtain diagnosis imaging most preferably.
The method that digital imaging system currently on the market realizes auto-exposure control.Although being visited introducing digital flat panel
After surveying device, the mode that number may be used converts the x-ray dose received to electric signal and is digitized acquisition, still
Due to being limited by digitized video treatment technology, the gray value for obtaining whole picture image needs to spend longer time, so shadow
As work station can not realize the feedback of real-time luminosity signal during exposing progress.
Invention content
In view of this, one aspect of the present invention proposes a kind of automated calibration system of auto-exposure control, on the other hand
A kind of Medical Devices of the automated calibration system including the auto-exposure control are proposed, another further aspect also proposed a kind of automatic
The automatic calibrating method of spectrum assignment.
According to an embodiment, the automated calibration system of auto-exposure control includes：One X-ray bulb, is penetrated for generating X
Line；One flat panel detector, for receiving the X-ray and generating an exposure image；One high pressure generator, for being penetrated for the X
Ray tube provides voltage and includes one first communication unit；And an image workstation, for receiving the exposure image and wrapping
Include one second communication unit；Wherein, it is communicated respectively by described first between the high pressure generator and the image workstation
Unit and second communication unit are communicated, and the image workstation counts the actual grey value of the exposure image and carries
For a feedback information to the high pressure generator, the high pressure generator is calibrated automatic exposure dosage according to the feedback information and is joined
Number.
Optionally, the image workstation calculates the ideal ash that the actual grey value of the exposure image is stored with it
The difference of angle value is simultaneously sent to the high pressure generator using the difference as feedback information, and the high pressure generator is according to
Difference calibrates automatic exposure dosimetry parameter.
Optionally, desired gray level that the image workstation is stored the actual grey value of the exposure image with it
Value is sent to the high pressure generator as feedback information, and the high pressure generator calculates the actual grey value of the exposure image
Automatic exposure dosimetry parameter is calibrated with the difference of the desired gray level value and according to the difference.
Optionally, the image workstation is sent to described using the actual grey value of the exposure image as feedback information
High pressure generator, the high pressure generator calculate the desired gray level value that the actual grey value of the exposure image is stored with it
Difference and according to the difference calibrate automatic exposure dosimetry parameter.
Optionally, the desired gray level value is preset gray value or the ash obtained from prestore table or curve
Angle value.
Optionally, first communication unit and the second communication unit respectively include the interface with hop communication, the interface
Selected from one of such as lower interface：Synchronous serial communication interface, asynchronous serial communication interface, CAN interface, CANOPEN buses connect
Mouth and Ethernet interfaces.
According to an embodiment, Medical Devices include the automatic calibration system of foregoing any auto-exposure control
System.
According to an embodiment, the automatic calibrating method of auto-exposure control includes：A an exposure image) is obtained；B it) calculates
The actual grey value of the exposure image；C the difference between the actual grey value and a desired gray level value of the exposure image) is calculated
Value；And D) according to difference calibration automatic exposure dosimetry parameter.
Optionally, the automatic calibrating method of auto-exposure control further includes：E) judge the difference whether in a default ash
Within the scope of angle value；And F) if the difference is in the default intensity value ranges, stop calibrating；If the difference exceeds
The default intensity value ranges, then continue step D).
Optionally, step D) further comprise：D1) if judging that the actual grey value is less than the reason according to the difference
Think gray value, then calibrates automatic exposure dosimetry parameter to increase exposure dose；And D2) if judging the reality according to the difference
Border gray value is higher than the desired gray level value, then calibrates automatic exposure dosimetry parameter to reduce exposure dose.
The present invention can realize the automatic calibration to Control Technique for Automatic Exposure, improve calibration accuracy and reduce the dimension of system
Protect cost.Specifically, calibration flow proposed by the present invention carries out automatically, and entire calibration process does not need after operator initiates
Additional manual operation, so as to shorten the time of calibration, and avoid operator lack experience calibration result is caused it is bad
It influences.In addition, high pressure generator is according to the difference between the gray value and ideal image greyscale value of the practical raw video of image system
Value, is modified preset target dose, can improve the accuracy of calibration.
Description of the drawings
Below will detailed description of the present invention embodiment by referring to accompanying drawing, the person of ordinary skill in the art is more clear that
The above-mentioned and other feature and advantage of the present invention, in attached drawing：
Fig. 1 is the block diagram according to the automated calibration system of the auto-exposure control of an embodiment of the present invention.
Fig. 2 is the flow chart according to the automatic calibrating method of the auto-exposure control of an embodiment of the present invention.
Fig. 3 is the flow chart according to the automatic calibrating method of the auto-exposure control of another embodiment of the present invention.
Wherein, reference numeral is as follows：
The automated calibration system of 100 auto-exposure controls
101 X-ray bulbs
102 flat panel detectors
103 high pressure generators
104 image workstations
1031 first communication units
1041 second communication units
200, the automatic calibrating method of 300 auto-exposure controls
S201-S204 steps
S301-S305 steps
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control illustrates this hair
Bright specific implementation mode, in the various figures identical label indicate identical part.
Herein, " schematic " expression " serving as example, example or explanation " should not will be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to a kind of preferred or more advantageous technical solution.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, so that simplified form is easy to understand, there is identical structure or function in some figures
Component only symbolically depicts one of those, or has only marked one of those.
Herein, " one ", "one" not only indicate " only this ", can also indicate the situation of " more than one ".
Herein, " first ", " second " etc. are only used for mutual differentiation, rather than indicate their significance level and sequence and each other
Existing premise etc..
It is the block diagram according to the automated calibration system of the auto-exposure control of an embodiment of the present invention referring to Fig. 1, Fig. 1.
As shown in Figure 1, the automated calibration system 100 of auto-exposure control includes an X-ray bulb 101, a flat panel detector 102, one
High pressure generator 103 and an image workstation 104.For generating X-ray, flat panel detector 102 is used for X-ray bulb 101
It receives X-ray and generates an exposure image, high pressure generator 103 is used to provide voltage, image workstation for X-ray bulb 101
104 for receiving exposure image.Wherein, high pressure generator 103 includes one first communication unit 1031, and image workstation 104 wraps
One second communication unit 1041 is included, to pass through the first communication unit between high pressure generator 103 and image workstation 104 respectively
1031 and second communication unit 1041 can be communicated.Image workstation 104 counts the actual grey value of exposure image and carries
For a feedback information to high pressure generator 103, high pressure generator 103 calibrates automatic exposure dosimetry parameter according to feedback information.
In change mode, digital flat-panel detector may be used in flat panel detector 102, and according to practical application
Ionisation chamber plate (not shown) can also be arranged in situation before digital flat-panel detector.Ionisation chamber plate can play real-time detection and anti-
The effect of the received x-ray dose of feedback is preset when the x-ray dose value of feedback obtained by ionisation chamber reaches high pressure generator
Target dose when, current exposure can end automatically.
It is described in detail below for the communication between image workstation 104 and high pressure generator 103.
First communication unit 1031 and the second communication unit 1041 can respectively include the interface with hop communication, the interface
Can be, such as, but not limited to, synchronous serial communication interface, asynchronous serial communication interface, CAN interface, CANOPEN buses
Interface and Ethernet interfaces.Those skilled in the art can be arranged a variety of different communications and connect according to the actual application
Mouthful, the present invention is unrestricted in this regard.
In one embodiment, the actual grey value by high pressure generator 103 based on exposure image and a desired gray level
Difference between value calibrates automatic exposure dosimetry parameter.Wherein, desired gray level value can be before calibration process starts by grasping
It is manually entered as personnel and is stored in the information in associated components, or can also be to be recorded in pre-stored table or curve
In information.Also, the aforementioned information being manually entered or pre-stored table or curve can both be stored in image work
It stands in 104, can also be stored in high pressure generator 103.The table or curve can embody the BMI information of patient, each dose
Correspondence between the information such as magnitude, each gray value, each voltage value, to associated components (such as high pressure generator 103 or image
Work station 104) desired gray level value can be obtained automatically by way of tabling look-up.
Specifically, when storing desired gray level value by image workstation 104, image workstation 104 can calculate exposure diagram
The difference of the actual grey value of picture and its desired gray level value stored, and the difference is sent to high pressure as feedback information
Generator 103 or image workstation 104 can also be directly using the actual grey values of exposure image and desired gray level value as anti-
Feedforward information is sent to high pressure generator 103, and the actual grey value and desired gray level value of exposure image are calculated by high pressure generator 103
Difference, then by high pressure generator 103 according to the difference calibrate automatic exposure dosimetry parameter.When by high pressure generator 103
When storing desired gray level value, the actual grey value of exposure image can be only sent to by image workstation 104 as feedback information
High pressure generator 103 is calculated the desired gray level that the actual grey value of the exposure image is stored with it by high pressure generator 103
The difference of value simultaneously calibrates automatic exposure dosimetry parameter according to the difference.
Those skilled in the art will readily recognize that automatic exposure dosimetry parameter is influenced by multiple factors, such as X
Tube voltage, tube current and load time of ray tube etc. can be realized pair by the value of the aforesaid plurality of factor of corrdinated adjustment
The calibration of automatic exposure dosimetry parameter.It is how automatic to calibrate by adjusting the value of the factors such as tube voltage, tube current, load time
Exposure dose parameter belongs to the generally known content of those skilled in the art, can adjust the above three factor simultaneously, also may be used
To select that one or two of three factors are adjusted as needed, the present invention is herein without repeating.
It is the flow chart according to the automatic calibrating method of the auto-exposure control of an embodiment of the present invention referring to Fig. 2, Fig. 2
According to an embodiment.As shown in Fig. 2, the automatic calibrating method 200 of auto-exposure control includes the following steps：
S201：Obtain an exposure image；
S202：Calculate the actual grey value of the exposure image；
S203：Calculate the difference between the actual grey value of the exposure image and a desired gray level value；And
S204：Automatic exposure dosimetry parameter is calibrated according to the difference.
Illustrated so that automatic calibrating method 200 is applied to an x-ray diagnostic equipment as an example, x-ray diagnostic equipment into
Enter calibration mode, after completing automatic control spectrum assignment Irnaging procedures, obtains an exposure image (step S201), set by radiodiagnosis
Standby image workstation counts the actual grey value (step S202) of obtained original exposure image, calculate actual grey value with
Difference (step S203) between one desired gray level value.
As described in above in conjunction with Fig. 1, it can be carried out between the image workstation and high pressure generator of x-ray diagnostic equipment
Communication, and its Content of Communication can be configured according to the actual application.Image workstation can calculate the difference and anti-
It feeds high pressure generator, actual grey value and desired gray level value are directly either fed back to high pressure generator again or only will be real
Border gray value feeds back to high pressure generator.Then, high pressure generator is according to practical image greyscale value and ideal image greyscale value
Difference calibrates automatic exposure dosimetry parameter (step S204).
Wherein, step S204 can also include：If judging that actual grey value is less than desired gray level value according to the difference,
Automatic exposure dosimetry parameter is calibrated to increase exposure dose；And if judging that the actual grey value is higher than institute according to the difference
Desired gray level value is stated, then calibrates automatic exposure dosimetry parameter to reduce exposure dose.
In change mode, above-mentioned calibration process can be the calibration process to iterate, complete automatic control every time and expose
It is light-operated to be formed as after obtaining exposure image, made from image work by changing the preset target light exposure dosimetry parameter of high pressure generator
The practical image greyscale value and ideal image greyscale value for making station feedback progressively reach unanimously.
Referring to Fig. 3, Fig. 3 is the flow according to the automatic calibrating method of the auto-exposure control of another embodiment of the present invention
Figure.As shown in figure 3, the automatic calibrating method 300 of auto-exposure control includes similar with the step S201-S203 of method 200
Step S301-S303.Stress that the difference of method 300 and method 200, method 300 further include following steps below：
Step S304：Judge the difference whether in a default intensity value ranges；And
Step S305：If the difference is in the default intensity value ranges, without calibration；If the difference is super
Go out the default intensity value ranges, then automatic exposure dosimetry parameter is calibrated according to the difference and continued.
Wherein default intensity value ranges are usually related to the characteristic of used imaging device (such as flat panel detector), in reality
It can also as needed be preset by operating personnel in trampling, the present invention is unrestricted in this regard.
The present invention also provides a kind of Medical Devices, which includes foregoing any auto-exposure control
Automated calibration system.For example, which can be the equipment for carrying out medical diagnosis using X-ray.
In conclusion the automated calibration system and method and Medical Devices of present invention offer auto-exposure control.According to one
The automated calibration system of embodiment, auto-exposure control includes：One X-ray bulb, for generating X-ray；One tablet detects
Device, for receiving the X-ray and generating an exposure image；One high pressure generator, for providing voltage for the X-ray bulb
And include one first communication unit；And an image workstation, for receiving the exposure image and including one second communication unit
Member；Wherein, pass through first communication unit and described second between the high pressure generator and the image workstation respectively
Communication unit is communicated, and the image workstation counts the actual grey value of the exposure image and provides a feedback information extremely
The high pressure generator, the high pressure generator calibrate automatic exposure dosimetry parameter according to the feedback information.The present invention can
It realizes the automatic calibration to Control Technique for Automatic Exposure, improve calibration accuracy and reduces the maintenance cost of system.
Example the above is only the implementation of the present invention is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of automated calibration system of auto-exposure control, including：
One X-ray bulb, for generating X-ray；
One flat panel detector, for receiving the X-ray and generating an exposure image；
One high pressure generator, for providing voltage for the X-ray bulb and including one first communication unit；And
One image workstation, for receiving the exposure image and including one second communication unit；
Wherein, pass through first communication unit and described second between the high pressure generator and the image workstation respectively
Communication unit is communicated, and the image workstation counts the actual grey value of the exposure image and provides a feedback information extremely
The high pressure generator, the high pressure generator calibrate automatic exposure dosimetry parameter according to the feedback information.
2. the automated calibration system of auto-exposure control as described in claim 1, wherein described in the image workstation calculates
The difference of the actual grey value of exposure image and its desired gray level value stored is simultaneously sent out the difference as feedback information
It send to the high pressure generator, the high pressure generator calibrates automatic exposure dosimetry parameter according to the difference.
3. the automated calibration system of auto-exposure control as described in claim 1, wherein the image workstation is by the exposure
The actual grey value of light image is sent to the high pressure generator, institute with its desired gray level value stored as feedback information
It states high pressure generator and calculates the actual grey value of the exposure image with the difference of the desired gray level value and according to the difference
Calibrate automatic exposure dosimetry parameter.
4. the automated calibration system of auto-exposure control as described in claim 1, wherein the image workstation is by the exposure
The actual grey value of light image is sent to the high pressure generator as feedback information, and the high pressure generator calculates the exposure
The difference of the actual grey value of image and its desired gray level value stored simultaneously calibrates automatic exposure dosage according to the difference
Parameter.
5. the automated calibration system of the auto-exposure control as described in one of claim 2-4, wherein the desired gray level value is
Preset gray value or the gray value obtained from prestore table or curve.
6. the automated calibration system of auto-exposure control as described in claim 1, wherein first communication unit and second
Communication unit respectively includes the interface with hop communication, and the interface is selected from such as one of lower interface：It is synchronous serial communication interface, asynchronous
Serial communication interface, CAN interface, CANOPEN bus interface and Ethernet interfaces.
7. a kind of Medical Devices include the automated calibration system of the auto-exposure control as described in one of claim 1-6.
8. a kind of automatic calibrating method of auto-exposure control, including：
A an exposure image) is obtained；
B the actual grey value of the exposure image) is calculated；
C the difference between the actual grey value and a desired gray level value of the exposure image) is calculated；And
D automatic exposure dosimetry parameter) is calibrated according to the difference.
9. the automatic calibrating method of auto-exposure control as claimed in claim 8, further includes：
E) judge the difference whether in a default intensity value ranges；And
F) if the difference is in the default intensity value ranges, without calibration；If the difference is beyond described default
Intensity value ranges then continue step D).
10. the automatic calibrating method of auto-exposure control as claimed in claim 8 or 9, wherein step D) further comprise：
D1) if judging that the actual grey value is less than the desired gray level value according to the difference, automatic exposure dosage is calibrated
Parameter is to increase exposure dose；And
D2) if judging that the actual grey value is higher than the desired gray level value according to the difference, automatic exposure dosage is calibrated
Parameter is to reduce exposure dose.
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| CN201611145079.2A CN108606804A (en) | 2016-12-13 | 2016-12-13 | The automated calibration system and method and Medical Devices of auto-exposure control |
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| CN201611145079.2A CN108606804A (en) | 2016-12-13 | 2016-12-13 | The automated calibration system and method and Medical Devices of auto-exposure control |
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| CN110916694A (en) * | 2019-11-01 | 2020-03-27 | 东软医疗系统股份有限公司 | Imaging method, imaging device, workstation and X-ray camera system |
| CN111866182A (en) * | 2020-08-10 | 2020-10-30 | 上海联影医疗科技有限公司 | Medical image system and communication method |
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| CN110916694A (en) * | 2019-11-01 | 2020-03-27 | 东软医疗系统股份有限公司 | Imaging method, imaging device, workstation and X-ray camera system |
| CN110916694B (en) * | 2019-11-01 | 2023-05-30 | 东软医疗系统股份有限公司 | Imaging method, imaging device, workstation and X-ray imaging system |
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Application publication date: 20181002 |