CN106880906A - A kind of real-time verification device and method that position is put for patient in radiotherapy - Google Patents
A kind of real-time verification device and method that position is put for patient in radiotherapy Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
- A61N5/1031—Treatment planning systems using a specific method of dose optimization
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1059—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using cameras imaging the patient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Abstract
The present invention relates to patient position verification technique field in radiation therapy process, more particularly, to a kind of real-time verification device and method that position is put for patient in radiotherapy.Including the first optical camera being arranged on around therapeutic bed, second optical camera and the 3rd optical camera, every optical camera is arranged on corresponding support, wherein the first optical camera is arranged on the front just to therapeutic bed, second optical camera and the 3rd optical camera are separately positioned on the both sides of therapeutic bed, three optical cameras are connected on video frequency collection card by video line, video frequency collection card is arranged on graphics workstation, the head of video scaling board correspondence patient, foot, left side, right side is arranged in therapeutic bed, video scaling board gathers uncalibrated image and carrys out calibrating camera respectively, graphics workstation controls video camera to carry out the real-time verification that patient puts position by algorithm and software.It can realize accurately putting patient position guiding and checking, substantially increase the precision of radiotherapy.
Description
Technical field
The present invention relates to patient position verification technique field in radiation therapy process, controlled for radiation more particularly, to one kind
Patient puts the real-time verification device and method of position in treatment.
Background technology
Radiotherapy (abbreviation radiotherapy) is one of three big technological means for the treatment of of cancer, and accurate radiotherapy is radiotherapy area research
Forward position and focus.Patient accurately puts the premise and basis that position is accurate radiotherapy, and patient must be entered in radiotherapy planning is performed
The accurate pendulum position of row, could obtain desired good therapeutic effect.In clinical treatment, focus target area center can be because to suffering from
The inaccurate and patient of person's pendulum position unintentional motion in the treatment produces change, prevents ray from being radiated at patient's exactly
On focus target location, larger error is brought to treatment, so that can not thoroughly heal a sufferer of his infirmity, while as right
The excessive irradiation of patient's normal structure is so as to cause complication.Therefore, quick accurate pendulum position checking how is carried out to patient simultaneously
The real-time monitoring patient position deviation that unintentional motion is produced in the treatment is to implement the key point of accurate radiotherapy.
In the prior art main flow termed image-guided radiotherapy patient pendulum position verification technique be mainly using x-ray imaging, kV grades
Conical beam CT (CBCT) and MRI imaging techniques are come the checking of pendulum position and the amendment of Set-up errors being carried out patient by several times.Its
Have the drawback that imaging is not clear enough, or extra dose of radiation can be brought to patient's normal structure, have and cause patient simultaneously
Send out the possibility of disease.Working together, it is obtained after image, it is necessary to registering time of fusion more long verifies the pendulum position of patient, it is impossible to accomplish reality
When pendulum position checking.
So, the problem that prior art is present is that patient can be made to be subject to extra dose of radiation in imaging process, is increased
The ill risk of patient normal structure；While more multiple using the algorithm calculation step that the image for obtaining put position checking
It is miscellaneous, it is difficult to accomplish to put position checking in real time, have an impact the possibility that patient treats curative effect.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art providing a kind of reality that position is put for patient in radiotherapy
When verify device and method.So as to effectively solve the problems of the prior art.
To achieve the above object, the technical scheme taken of the present invention is：Described one kind is used for patient's pendulum in radiotherapy
The real-time verification device of position, is characterized in including being arranged on the first optical camera, second around the therapeutic bed in therapeutic room
Optical camera and the 3rd optical camera, every optical camera are arranged on corresponding support, wherein the first optical camera
Machine is arranged on the front just to therapeutic bed, and the second optical camera and the 3rd optical camera are separately positioned on the two of therapeutic bed
Side, three optical cameras are connected on video frequency collection card by video line, and video frequency collection card is arranged on graphics workstation, depending on
The head of frequency marking fixed board correspondence patient, foot, left side, right side are arranged in therapeutic bed, and video scaling board gathers calibration maps respectively
As carrying out calibrating camera, graphics workstation controls video camera to carry out the real-time verification that patient puts position by algorithm and software.
Described therapeutic bed position rotary therapeutic bed, the support height of the first described optical camera is 1.8 meter -2.0
The support height of rice, the second optical camera and the 3rd optical camera is 1.2 meters -2.0 meters, three supports of optical camera
Apart from 2.5 meters -3.0 meters of the horizontal range at therapeutic bed center, the second optical camera and the 3rd optical camera put position to base
Line is put perpendicular to therapeutic bed and by therapeutic bed center, video camera shoots therapeutic bed and the trouble being fixed thereon from the top down
Person.
A kind of described real-time verification method that position is put for patient in radiotherapy, is characterized in comprising the following steps：
(1) patient puts the acquisition of position and standard reference image first：Patient first therapeutic room receive treat when, Jiang Santai
Video camera sets according to described checking device and connects, and opens the control software on checking device figure work station；According to controlling
The patient's pendulum position parameter for treating planning system output puts position to patient, is to be set by conventional DR by conventional pendulum position verification method
The correct pendulum position of patient is determined for the DRR image registrations of image and the treatment planning systems output of collection, image work is used
Algorithm software on standing obtains the canonical reference pendulum position optical imagery of each camera, and by the optical image storage in database
In；
(2) acquisition of error image：When the follow-up interval procedure of patient is carried out, the real-time video figure that each camera shoots
The standard reference image of picture and the camera carries out mathematic interpolation, will be subtracted per the rgb value of each pixel of frame realtime graphic
The rgb value of each pixel of the standard reference image of correspondence camera, obtains set-up deviation image；
(3) acquisition of area-of-interest：In mean filter and 7*7 to set-up deviation image first by 5*5 kernels
The Gaussian filter of core carries out smothing filtering, and the error image after smothing filtering is carried out into contours extract using canny operators obtains
Take the maximum rectangular area coordinate comprising all profiles, i.e. area-of-interest coordinate；
(4) patient's pendulum position checking：Calculate on the standard reference image and real time video image in area-of-interest coordinate
Angle point, and the angle point of two images is matched；The grid deviation value of matching angle point is obtained, if deviation is less than setting
1 millimeter of threshold value, then assert that patient's pendulum position is correct, if deviation is more than 1 millimeter, patient is put again according to deviation
Position；
(5) patient's set-up deviation is obtained：The ROI region coordinate of acquisition is mapped to reference picture and and real time video image
On, to map region by improved ORB (Oriented FAST and Rotated BRIEF) angle point grid registration Algorithm
Extract angle point, the angle point in registering two images in ROI region；；Extracted using ORB algorithms in the automatic ROI region for obtaining
Angle point and the description operator of angle point is obtained, calculated according to the angle point on the good real time video image of standard reference image and corner description
Son is matched；And ORB algorithms are improved, delete wherein coordinate position, direction and the completely the same background angle point of description operator；
The position deviation value between registering angle point is calculated under same coordinate system, is calculated according to the calibrating parameters to each camera
The actual deviation distance of collocation point under the camera；
(6) patient's pendulum position checking：If in some or several cameras the angular coordinate deviation of video image and its
The angular coordinate of registration is more than 1 millimeter on corresponding standard reference image, then the position according to camera and angular coordinate deviation
Value guides medical worker to be corrected adjustment to patient's pendulum position, the computing of step (2) is re-started after adjustment, until patient is every
The standard reference image deviation of video image and the camera under individual camera is less than 1 millimeter, meets treatment and requires then originally
Invention device outputs signal to treatment control system, starts treatment；
(7) patient body position in monitor in real time treatment：In patient treatment procedure, three bodies of camera monitor in real time patient
Position, the real time video image of camera carries out difference operation with respective standard reference image, difference operation image is carried out certainly
Dynamic contours extract, the contour area of acquisition then needs to stop treating if greater than 10 squares, pendulum position is carried out to patient and is adjusted
It is whole, if contour area is less than 10 squares, continual cure；
(8) patient's pendulum position monitor in real time：During patient treats, camera monitor in real time patient, when the nothing of patient
Difference value between video image that psychomotor causes and pendulum position reference picture more than setting 1 millimeter of threshold value when, system will
Sending signal transmission stops radiotherapy to treatment control system, control system, and medical worker enters according to set-up deviation parameter to patient
Row puts position again, then resumes treatment.
The beneficial effects of the invention are as follows：Described is a kind of for the real-time verification device of patient's pendulum position and side in radiotherapy
Method, its design is carried out quick accurate pendulum position to patient using the method that multichannel ordinary optical video camera multi-angle is imaged and tested
Card, and real-time monitoring patient position state in the treatment, radiotherapy control system is fed back to by the signal that computing is obtained, to suffering from
Person is accurately put position guiding and is verified, substantially increases the precision of radiotherapy.Its advantage also includes：(1) its is cheap, imaging
High precision；(2) optical camera imaging does not increase any extra dose of radiation to patient, effectively reduces patient in treatment
Shi Yinwei is suffered from the risk of complication by additional radiation dosage；(3) modified hydrothermal process increased arithmetic speed, can be to suffering from
Person is carried out quickly in the guiding of string pendulum position and checking；(4) patient's unintentional motion can be monitored with monitor in real time, one it is found that patient
Appearance Set-up errors can take immediate steps and protect patient；(5) time that patient puts position can be effectively reduced, is objectively reduced
Patient and operating personnel are subject to the risk of additional radiation dose irradiation；(6) the pendulum position time is reduced, radiotherapy can be effectively reduced
The stand-by period of accelerator, it is thus possible to reduce treatment cost；(7) shadow of the not treated indoor electromagnetic interference of optical imaging system
Ring, can adapt to electromagnetic environment complicated in therapeutic room, strong adaptability.
Brief description of the drawings：
Fig. 1 is apparatus structure schematic diagram of the invention；
Fig. 2 is implementation flowage structure schematic diagram of the invention；
Fig. 3 is three standard reference images of camera；
Fig. 4 is the angle point that the first optical camera is extracted and its registering picture；
Fig. 5 is the angle point that the second optical camera is extracted and its registering picture；
Fig. 6 is the angle point that the 3rd optical camera is extracted and its registering picture.
Shown in figure：1. the first optical camera；2. the second optical camera；3. the 3rd optical camera；4. therapeutic bed；
5. video frequency collection card；6. graphics workstation；7. video scaling board；8. support.
Specific embodiment
It is described in further detail below in conjunction with the preferred example shown in accompanying drawing：
As illustrated in fig. 1 and 2, a kind of described real-time verification device that position is put for patient in radiotherapy, is characterized in
Taken the photograph including the first optical camera 1 around the therapeutic bed 4 that is arranged in therapeutic room, the second optical camera 2 and the 3rd optics
Camera 3, every optical camera is arranged on corresponding support 8, wherein the first optical camera 1 is arranged on just to therapeutic bed
Front, the second optical camera 2 and the 3rd optical camera 3 are separately positioned on the both sides of therapeutic bed 4, and three optical cameras are led to
Cross video line to be connected on video frequency collection card 5, video frequency collection card 5 is arranged on graphics workstation 6, the correspondence of video scaling board 7 is suffered from
The head of person, foot, left side, right side are arranged in therapeutic bed 4, and video scaling board 7 gathers uncalibrated image to demarcate shooting respectively
Machine, graphics workstation 6 controls video camera to carry out the real-time verification that patient puts position by algorithm and software.
Described therapeutic bed position rotary therapeutic bed, the support height of the first described optical camera 1 is 1.8 meter -2.0
The support height of rice, the second optical camera 2 and the 3rd optical camera 3 is 1.2 meters -2.0 meters, three branch of optical camera
The base of frame 8 apart from 2.5 meters -3.0 meters of the horizontal range at therapeutic bed center, put by the second optical camera 2 and the 3rd optical camera 3
Position line is put perpendicular to therapeutic bed and by the center of therapeutic bed 4, video camera shoots therapeutic bed and is fixed on it from the top down
On patient.
A kind of described real-time verification method that position is put for patient in radiotherapy, is characterized in comprising the following steps：
(1) patient puts the acquisition of position and standard reference image first：Patient first therapeutic room receive treat when, Jiang Santai
Video camera sets according to described checking device and connects, and opens the control software on checking device figure work station；According to controlling
The patient's pendulum position parameter for treating planning system output puts position to patient, is to be set by conventional DR by conventional pendulum position verification method
The correct pendulum position of patient is determined for the DRR image registrations of image and the treatment planning systems output of collection, image work is used
Algorithm software on standing obtains the canonical reference pendulum position optical imagery of each camera, and by the optical image storage in database
In；
(2) acquisition of error image：When the follow-up interval procedure of patient is carried out, the real-time video figure that each camera shoots
The standard reference image of picture and the camera carries out mathematic interpolation, will be subtracted per the rgb value of each pixel of frame realtime graphic
The rgb value of each pixel of the standard reference image of correspondence camera, obtains set-up deviation image；
(3) acquisition of area-of-interest：In mean filter and 7*7 to set-up deviation image first by 5*5 kernels
The Gaussian filter of core carries out smothing filtering, and the error image after smothing filtering is carried out into contours extract using canny operators obtains
Take the maximum rectangular area coordinate comprising all profiles, i.e. area-of-interest coordinate；
(4) patient's pendulum position checking：Calculate on the standard reference image and real time video image in area-of-interest coordinate
Angle point, and the angle point of two images is matched；The grid deviation value of matching angle point is obtained, if deviation is less than setting
1 millimeter of threshold value, then assert that patient's pendulum position is correct, if deviation is more than 1 millimeter, patient is put again according to deviation
Position；
(5) patient's set-up deviation is obtained：The ROI region coordinate of acquisition is mapped to reference picture and and real time video image
On, to map region by improved ORB (Oriented FAST and Rotated BRIEF) angle point grid registration Algorithm
Extract angle point, the angle point in registering two images in ROI region；；Extracted using ORB algorithms in the automatic ROI region for obtaining
Angle point and the description operator of angle point is obtained, calculated according to the angle point on the good real time video image of standard reference image and corner description
Son is matched；And ORB algorithms are improved, delete wherein coordinate position, direction and the completely the same background angle point of description operator；
The position deviation value between registering angle point is calculated under same coordinate system, is calculated according to the calibrating parameters to each camera
The actual deviation distance of collocation point under the camera；
(6) patient's pendulum position checking：If in some or several cameras the angular coordinate deviation of video image and its
The angular coordinate of registration is more than 1 millimeter on corresponding standard reference image, then the position according to camera and angular coordinate deviation
Value guides medical worker to be corrected adjustment to patient's pendulum position, the computing of step (2) is re-started after adjustment, until patient is every
The standard reference image deviation of video image and the camera under individual camera is less than 1 millimeter, meets treatment and requires then originally
Invention device outputs signal to treatment control system, starts treatment；
(7) patient body position in monitor in real time treatment：In patient treatment procedure, three bodies of camera monitor in real time patient
Position, the real time video image of camera carries out difference operation with respective standard reference image, difference operation image is carried out certainly
Dynamic contours extract, the contour area of acquisition then needs to stop treating if greater than 10 squares, pendulum position is carried out to patient and is adjusted
It is whole, if contour area is less than 10 squares, continual cure；
(8) patient's pendulum position monitor in real time：During patient treats, camera monitor in real time patient, when the nothing of patient
Difference value between video image that psychomotor causes and pendulum position reference picture more than setting 1 millimeter of threshold value when, system will
Sending signal transmission stops radiotherapy to treatment control system, control system, and medical worker enters according to set-up deviation parameter to patient
Row puts position again, then resumes treatment.
As shown in figure 3, the present invention puts for human emulation body mould, position guides specific embodiment and checking is implemented, and uses three
Haikang prestige depending on high-definition camera human body plastic simulation in laboratory is placed on from left and right, preceding upper three angle guiding in real time
Model puts position, and verifies the correctness for putting position, and camera is connected into graphics workstation meter by video line and video frequency collection card
On calculation machine, three camera real time video images are gathered, and determine three standard reference images of camera.Use a chessboard
Case marker fixed board is demarcated to each camera parameter, and the specification of gridiron pattern scaling board is that each small lattice size is 5 millimeter of * 5 milli
Rice, gridiron pattern is the lattice of 20 lattice * 20.After human body plastic simulation model pendulum position is offset downward into 20 millimeters, by video image and standard
Reference picture is calculated, and obtains the deviation data of guiding pendulum position.As shown in figure 4, guiding patient's pendulum position is implemented, the first camera
The angle point registration of angle point and standard reference image such as Fig. 3 of real time video image area-of-interest, the image of the registration point of camera 1
Grid deviation average value x=1.95 pixels, y=21.17 pixels.According to the calibrating parameters of the first camera, 1.25 pixel=1 milli
Rice, can be calculated the image shift of camera 1 for 17.01 millimeters, and the error with standard reference image pendulum position is 2.99 millimeters.Second
The angle point and standard reference image of the real time video image area-of-interest of camera 2 are as shown in Figure 5.The registration point of second camera 2
Image coordinate deviation average x=55.41 pixels, y=-2.01 pixels.According to the calibrating parameters of second camera 2,2.76
Pixel=1 millimeter, can be calculated the image shift of camera 2 for 19.96 millimeters, and the error with standard reference image pendulum position is 0.04
Millimeter.The angle point of the real time video image area-of-interest of the 3rd camera 3 and the angle point registration of standard reference image are such as Fig. 6 institutes
Show, the image coordinate deviation average x=-64.75 pixels of the registration point of camera 3, y=0.127 pixels.According to camera 3
Calibrating parameters, 3.43 pixel=1 millimeter can be calculated the image shift of camera 3 for -18.99 millimeters, be put with standard reference image
The error of position is 1.01 millimeters.Putting position and their own calibrating parameters according to three cameras calculate working as body mould
The deviation of forward swing position and standard pendulum position is that the distance that body mould is moved to pin direction and actual shifts distance are maximum no more than 2.99 millis
Rice, and consider three general effects of camera, result of calculation and actual range deviation are 0.04 millimeter, it was demonstrated that present invention dress
Put and method feasibility, reach practical application requirement.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of real-time verification device that position is put for patient in radiotherapy, is characterized in including being arranged on controlling in therapeutic room
The first optical camera, the second optical camera and the 3rd optical camera of around bed are treated, every optical camera is arranged on
On corresponding support, wherein the first optical camera is arranged on the front just to therapeutic bed, the second optical camera and the 3rd light
The both sides that video camera is separately positioned on therapeutic bed are learned, three optical cameras are connected on video frequency collection card by video line, depending on
Frequency capture card is arranged on graphics workstation, and the head of video scaling board correspondence patient, foot, left side, right side are arranged on treatment
On bed, video scaling board gathers uncalibrated image and carrys out calibrating camera respectively, and graphics workstation controls shooting by algorithm and software
Machine come carry out patient put position real-time verification.
2. a kind of real-time verification device that position is put for patient in radiotherapy as claimed in claim 1, it is characterised in that：Institute
The therapeutic bed position rotary therapeutic bed stated, the support height of the first described optical camera is 1.8 meters -2.0 meters, the second optics
The support height of video camera and the 3rd optical camera is 1.2 meters -2.0 meters, and the bracket base distance of three optical cameras is controlled
2.5 meters -3.0 meters of the horizontal range at Liao Chuan centers, the second optical camera and the 3rd optical camera putting position line are vertical
In therapeutic bed and by therapeutic bed center, video camera shoots therapeutic bed and the patient being fixed thereon from the top down.
3. it is a kind of in radiotherapy patient put position real-time verification method, it is characterised in that be to comprise the following steps：
(1) patient puts the acquisition of position and standard reference image first：Patient when therapeutic room receives to treat, three is imaged first
Machine sets according to described checking device and connects, and opens the control software on checking device figure work station；Counted according to treatment
Patient's pendulum position parameter of the system of drawing output puts position to patient, is to be adopted by conventional DR equipment by conventional pendulum position verification method
Collection image and treatment planning systems output DRR image registrations come determine patient correct pendulum position, using on image workstation
Algorithm software obtain the canonical reference pendulum position optical imagery of each camera, and by the optical image storage in database；
(2) acquisition of error image：When the follow-up interval procedure of patient is carried out, real time video image that each camera shoots and
The standard reference image of the camera carries out mathematic interpolation, will subtract correspondence per the rgb value of each pixel of frame realtime graphic
The rgb value of each pixel of the standard reference image of camera, obtains set-up deviation image；
(3) acquisition of area-of-interest：To set-up deviation image first by 5*5 kernels mean filter and 7*7 kernels
Gaussian filter carries out smothing filtering, and the error image after smothing filtering is carried out into contours extract using canny operators obtains bag
Maximum rectangular area coordinate containing all profiles, i.e. area-of-interest coordinate；
(4) patient's pendulum position checking：The angle point on the standard reference image and real time video image in area-of-interest coordinate is calculated,
And matched the angle point of two images；The grid deviation value of matching angle point is obtained, if deviation is less than 1 millimeter of setting
Threshold value, then assert that patient's pendulum position is correct, if deviation is more than 1 millimeter, position is put again to patient according to deviation；
(5) patient's set-up deviation is obtained：By the ROI region coordinate of acquisition be mapped to reference picture and with real time video image on,
Region to mapping is carried by improved ORB (Oriented FAST and Rotated BRIEF) angle point grid registration Algorithm
Take angle point, the angle point in registering two images in ROI region；；In the automatic ROI region for obtaining angle is extracted using ORB algorithms
The description operator of angle point is put and obtains, according to angle point and corner description operator on the good real time video image of standard reference image
Matched；And ORB algorithms are improved, delete wherein coordinate position, direction and the completely the same background angle point of description operator；
The position deviation value between registering angle point is calculated under same coordinate system, is calculated according to the calibrating parameters to each camera
The actual deviation distance of collocation point under the camera；
(6) patient's pendulum position checking：If the angular coordinate deviation of video image is corresponding in some or several cameras
Standard reference image on registration angular coordinate be more than 1 millimeter, then the position according to camera and angular coordinate deviation are drawn
Lead medical worker and adjustment is corrected to patient's pendulum position, the computing of step (2) is re-started after adjustment, until patient takes the photograph at each
As the video image and the standard reference image deviation of the camera under head are less than 1 millimeter, meet treatment and require the then present invention
Device outputs signal to treatment control system, starts treatment；
(7) patient body position in monitor in real time treatment：In patient treatment procedure, three positions of camera monitor in real time patient,
The real time video image of camera carries out difference operation with respective standard reference image, and difference operation image is carried out automatically
Contours extract, the contour area of acquisition is then needed to stop treating if greater than 10 squares, and the adjustment of pendulum position is carried out to patient,
If contour area is less than 10 squares, continual cure；
(8) patient's pendulum position monitor in real time：During patient treats, camera monitor in real time patient is unconscious as patient
Difference value between the video image that causes of motion and pendulum position reference picture more than setting 1 millimeter of threshold value when, system will send
Signal transmission stops radiotherapy to treatment control system, control system, and medical worker carries out weight to patient according to set-up deviation parameter
New pendulum position, then resumes treatment.
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| CN109985315A (en) * | 2017-12-29 | 2019-07-09 | 北京连心医疗科技有限公司 | A kind of nuclear-magnetism termed image-guided radiotherapy method, equipment and storage medium |
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