CN110652660B - Patient positioning detection system - Google Patents
Patient positioning detection system Download PDFInfo
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- CN110652660B CN110652660B CN201910827406.XA CN201910827406A CN110652660B CN 110652660 B CN110652660 B CN 110652660B CN 201910827406 A CN201910827406 A CN 201910827406A CN 110652660 B CN110652660 B CN 110652660B
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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
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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
- 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
- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
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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
- A61N2005/1097—Means for immobilizing the patient
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Abstract
A patient positioning detection system, comprising the steps of: 1) acquiring image information of a current patient in a position, and converting the image information into a binary image; 2) extracting a body surface partial image of the patient by using a skin color recognition algorithm; 3) denoising the partial image of the body surface, and extracting the edge of the body surface to obtain a standard template and display the standard template; and comparing whether the body surface edge meets the human body contour of the standard template in real time and outputting a judgment result. The method is efficient and simple, can run in real time, ensures that any deviation is obvious, and can be used for adjusting the body position and posture of a doctor and a patient according to the prompt of the indicator lamp, so that the optimal time for the operation is found, and the radiation injury to the doctor is reduced.
Description
Technical Field
The invention relates to the field of medical treatment, in particular to a patient positioning detection system.
Background
Image-guided radiotherapy (IGRT) is always an improved radiotherapy technology, a key method for improving the radiotherapy level is limited by the technical level, the current domestic radiotherapy technology also depends on that a doctor locates the tumor position in a patient body and then delineates the tumor position on the body surface of the patient in advance under the CT irradiation condition, and the tumor position is taken as a reference radiation position in the operation.
However, since the human body is a non-rigid structure, the posture of the patient during the operation is likely to deviate from the posture during the CT scan for various reasons. According to statistics: when the malignant tumor of the breast tissue is treated, the position difference of the arms of the patient can have great influence on the position of the tumor; when treating prostate tumor, the position deviation of the legs of the patient can also greatly affect the position of the tumor. The great deviation of radiotherapy can damage the normal tissues around the tumor of a patient and easily cause organ inflammation and other complications, so that the accurate and effective adjustment of the body position of the patient is a key problem.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provides a patient positioning detection system which is efficient, simple, convenient, flexible and accurate to adjust the body position of a template in real time.
The invention adopts the following technical scheme:
a method of detecting patient positioning, comprising the steps of:
1) acquiring image information of a current patient in a position, and converting the image information into a binary image;
2) extracting a body surface partial image of the patient by using a skin color recognition algorithm;
3) denoising the partial image of the body surface, and extracting the edge of the body surface to obtain a standard template and display the standard template; and comparing whether the body surface edge meets the human body contour of the standard template in real time and outputting a judgment result.
Preferably, in step 2), the skin color is identified by filtering a threshold value of the binary image in the color space.
Preferably, in step 3), the body surface partial image is denoised by using a Lee filter, a Kuwahara filter and Gaussian filter.
Preferably, in step 3), a canny edge detection algorithm is used to extract the body surface edges.
Preferably, in step 3), the body surface edge is overlapped with the standard template, the horizontal pixel difference value of the corresponding point of the body surface edge and the standard template is compared with the deviation threshold value, and the judgment result is output.
Preferably, the deviation threshold is set according to different surgical requirements.
A patient positioning detection system, comprising:
the camera device is used for acquiring image information of the current patient in the setting position;
the detection judgment device extracts the body surface partial image of the patient by using a skin color recognition algorithm, denoises the body surface partial image, and extracts the body surface edge to obtain a standard template; comparing whether the body surface edge meets the human body contour of the standard template in real time;
the display device is used for displaying the body surface edge and the standard template in real time;
and the early warning device is used for outputting a judgment result.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
the method and the system can capture the body contour of the patient in real time, acquire the real-time body position information of the patient after identifying the skin color of the patient, superimpose the acquired image on the prior template, display the real-time situation of the patient through the camera and the screen, and lead the patient to flexibly and accurately adjust the body position of the template in real time. The method is efficient and simple, can run in real time, ensures that any deviation is obvious, and can be used for adjusting the body position and posture of a doctor and a patient according to the prompt of the indicator lamp, so that the optimal time for the operation is found, and the radiation injury to the doctor is reduced.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a diagram of collected image information;
FIG. 3 is a body surface partial image after skin color identification;
the invention is described in further detail below with reference to the figures and specific examples.
Detailed Description
The invention is further described below by means of specific embodiments.
The invention provides a patient positioning detection method, which is applied to the active adjustment of patient positioning in the radiotherapy process, and comprises the following steps with reference to fig. 1:
1) the physician determines the optimal posture of the patient for the operation under the guidance of CT, and acquires the image information of the patient in this posture, see fig. 2, which is an RGB image, and converts it into a binary image.
2) The uniqueness of human skin color in a color space is utilized, a maximum inter-class variance method with self-adaptive characteristics is used for determining a picture threshold value suitable for the skin color, and a human skin color part is extracted from a picture background, so that the real-time tracking of a body surface part is realized, and the method is shown in figure 3.
3) In order to accurately extract the edge information of a target and improve the accuracy of a template, preprocessing such as edge enhancement, edge extraction and the like is sequentially carried out on an extracted image, in the edge enhancement stage, a Lee filter, a Kuwahara filter and Gaussian filtering are respectively used for denoising the extracted image of a body surface part, then a canny edge detection operator is used for extracting the body surface edge of the image after edge enhancement, and an operation contrast template, namely a standard template, is obtained. Overlapping the image information (body surface edge) of the patient after the skin color identification with a standard template, setting a deviation threshold value a according to different operation requirements, comparing the horizontal pixel difference value of corresponding points of the two images with the value a, and outputting a judgment result.
In the actual operation process, a real-time human-computer interaction scene of the patient and the body position of the patient is established through a camera and a screen, the real-time position of the patient is identified by a skin color identification algorithm, the identified image is superposed on a contour template, the patient compares the real-time body contour of the patient on the screen with a standard template collected in advance, and the body position is adjusted in real time to realize complete coincidence,
the invention also provides a patient positioning detection system, which comprises: the device comprises an image pick-up device, a detection and judgment device, a display device, an early warning device and the like. The camera device is used for acquiring image information of a current patient in a position. The detection judging device is connected with the camera device, preprocesses image information, extracts a body surface partial image of a patient by applying a skin color recognition algorithm, denoises the body surface partial image, and extracts a body surface edge to obtain a standard template; and comparing whether the body surface edge meets the human body contour of the standard template in real time.
And the display device is connected with the detection and judgment device and is used for displaying the body surface edge and the standard template in real time. The early warning device is connected with the detection judgment device and used for outputting a judgment result.
The detection device of the system can be a data processing terminal of a computer and the like, the early warning device can adopt an indicator light to set a certain deviation threshold value a, and the obtained real-time body position image (body surface edge) of the patient is compared with the pixel value deviation b of the corresponding point in the standard template with the threshold value a so as to realize visual adjustment indication. When the deviation of the pixel value is larger than a, the red indicator light is on, which represents that the deviation of the patient and the template is larger, and the body surface edge extracted previously on the screen needs to be referred to for active correction so as to achieve the optimal body position of the operation; when the pixel deviation value is equal to or less than a, the green indicator light is on, which represents that the deviation range of the real-time body position of the patient and the template is within the controllable range, and the operation can be performed.
The system not only reduces the workload of doctors and radiation injury caused by adjusting the real-time body positions of patients for many times in the operation, but also improves the operation precision and ensures the operation quality.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (4)
1. A patient positioning detection system, comprising:
the camera device is used for acquiring image information of the current patient in the setting position;
the detection judgment device extracts the body surface partial image of the patient by using a skin color recognition algorithm, denoises the body surface partial image, extracts the body surface edge and obtains a standard template; comparing whether the body surface edge meets the human body contour of the standard template in real time;
the display device is used for displaying the body surface edge and the standard template in real time;
the early warning device is used for outputting a judgment result;
the positioning detection comprises the following steps:
1) acquiring image information of a current patient in a position, and converting the image information into a binary image;
2) extracting a body surface partial image of a patient by using a skin color identification algorithm, namely determining a picture threshold value suitable for skin color by using a maximum inter-class variance method with self-adaptive characteristics by using the uniqueness of the skin color of the human body in a color space, and extracting the skin color part of the human body from a picture background so as to realize real-time tracking of the body surface part;
3) denoising the partial image of the body surface, extracting the edge of the body surface, acquiring a standard template and displaying the standard template; comparing whether the body surface edge meets the human body contour of the standard template in real time and outputting a judgment result; and overlapping the body surface edge with the standard template, comparing the horizontal pixel difference value of the corresponding point of the body surface edge and the standard template with a deviation threshold value, and outputting a judgment result.
2. A patient positioning detection system as claimed in claim 1, wherein: in the step 3), denoising the body surface partial image by adopting a Lee filter, a Kuwahara filter and Gaussian filter.
3. A patient positioning detection system as claimed in claim 1, wherein: in step 3), a canny edge detection algorithm is adopted to extract the body surface edge.
4. A patient positioning detection system as claimed in claim 1, wherein: and setting a deviation threshold value according to different operation requirements.
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| CN113520419A (en) * | 2020-04-20 | 2021-10-22 | 湖南涌仁科技有限公司 | Posture detection support system for X-ray diagnosis and X-ray diagnosis device |
| CN111631744B (en) * | 2020-05-09 | 2023-04-14 | 赛诺威盛科技(北京)股份有限公司 | Method, device and system for CT scanning positioning |
| CN114283174A (en) * | 2021-12-24 | 2022-04-05 | 北京金山云网络技术有限公司 | Moving target tracking method and device and electronic equipment |
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