阅读说明：本技术 一种便于操作的射野校准检测方法及其装置 (Convenient-to-operate field calibration detection method and device ) 是由 马丽 陈蔚海 朱伟中 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种便于操作的射野校准检测方法及其装置,将特定的检测模体放置在治疗床上,调整检测模体和床的位置；然后高精度光学相机工作,采集图像,系统得到灯光野照射在检测模体上的图像I1；对检测模体进行X射线照射,可以得到一张显示X射线野和模体中坐标刻度的X线图像I2；分析I1中灯光野在检测模体上的位置,分析I2中射线野在检测模体上的位置。本发明采用光学成像和X射线影像综合分析技术,通过高精度光学相机采集灯光野照射在检测模体上的图像,X射线探测器采集X射线野照射检测模体后形成的X射线影像,系统自动分析上述光学图像和X射线影像,自动计算出灯光野在检测模体上的位置,从而计算出灯光野与射线野的一致性。(The invention discloses a convenient-to-operate field calibration detection method and a device thereof.A specific detection die body is placed on a treatment bed, and the positions of the detection die body and the bed are adjusted; then the high-precision optical camera works to collect images, and the system obtains an image I1 of the light field irradiated on the detection die body; carrying out X-ray irradiation on the detection die body to obtain an X-ray image I2 which displays an X-ray field and coordinate scales in the die body; and analyzing the position of the light field on the detection phantom in I1, and analyzing the position of the radiation field on the detection phantom in I2. The system automatically analyzes the optical image and the X-ray image, and automatically calculates the position of the light field on the detection die body, thereby calculating the consistency of the light field and the X-ray field.)

1. A portal calibration detection method convenient to operate is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

step 1, opening a light field of radiotherapy equipment, placing a specific detection mold body on a treatment bed, and adjusting the positions of the detection mold body and the bed to enable the center of the detection mold body to be located at the isocenter of the radiotherapy equipment;

step 2, working of the high-precision optical camera, collecting images, and obtaining an image I1 of the light field irradiated on the detection die body by the system;

step 3, the radiotherapy equipment works, and the detection die body is irradiated by X rays, so that an X-ray image I2 which displays an X-ray field and coordinate scales in the die body can be obtained;

and 4, analyzing the position of the light field on the detection die body in the I1, and analyzing the position of the ray field on the detection die body in the I2.

2. Device for implementing a conveniently operated portal calibration test method according to claim 1, characterized in that it comprises a test phantom (1); the surface of detecting die body (1) is equipped with first the central axis and second the central axis, first the central axis is perpendicular setting with first the central axis, the surface of detecting die body (1) is equipped with along first the central axis first scale (2) that set up, detect die body (1) and be equipped with on the surface along second the central axis second scale (3) that set up.

3. The device for conveniently operating the portal calibration detection method according to claim 2, wherein the first scale (2) and the second scale (3) are made of lead material, the measurement accuracy of the first scale (2) and the second scale (3) is 1mm, and the measurement range of the first scale (2) and the second scale (3) is-200 mm with the intersection point of the first central axis and the second central axis as an origin.

4. An apparatus for facilitating the field calibration test method according to claim 2, wherein the size of the test phantom (1) is 400mm x 50 mm.

5. The apparatus for easy-to-operate portal calibration detection method according to claim 2, wherein the scale lines at even values on the first scale (2) and the second scale (3) are long and the scale lines at odd values are short.

6. The apparatus of claim 5, wherein the ratio of the length of the scale line at the odd number value to the length of the scale line at the even number value is 1: 1.6.

7. the device for field calibration detection convenient to operate according to claim 2 is characterized in that the width of the second graduated scale (2) and the width of the first graduated scale (1) are 0.3 mm.

8. The device for the convenient-to-operate portal calibration detection method according to the claims 2-7, characterized in that the detection phantom is used by placing the detection phantom on a treatment couch; the high-precision optical camera is arranged at the head of the radiotherapy equipment and is positioned above the detection die body and the treatment couch.

Technical Field

The invention relates to the technical field of detection of consistency of light field and radiation field of radiotherapy equipment, in particular to a method and a device for calibrating and detecting a radiation field, which are convenient to operate.

Background

In radiotherapy, the light field of the lamp is used to characterize the size and irradiation range of the radiation field. The consistency detection of the light field and the radiation field (X-ray) is a very important content in the quality control work of radiotherapy equipment.

At present, some models for detecting the consistency of a light field and a radiation field (X-ray) exist, but visual inspection is needed at present, so that the subjective influence of a measuring result is large, the precision of the detecting result is not high, and a light field calibration detecting method and a device thereof which are convenient to operate are provided.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to a convenient-to-operate portal calibration detection method, which comprises the following steps,

step 1, opening a light field of radiotherapy equipment, placing a specific detection mold body on a treatment bed, and adjusting the positions of the detection mold body and the bed to enable the center of the detection mold body to be located at the isocenter of the radiotherapy equipment;

step 2, working of the high-precision optical camera, collecting images, and obtaining an image I1 of the light field irradiated on the detection die body by the system;

step 3, the radiotherapy equipment works, and the detection die body is irradiated by X rays, so that an X-ray image I2 which displays an X-ray field and coordinate scales in the die body can be obtained;

and 4, analyzing the position of the light field on the detection die body in the I1, and analyzing the position of the ray field on the detection die body in the I2.

The device for implementing the convenient-to-operate portal calibration detection method of claim 1, which comprises a detection die body; the surface of the detection die body is provided with a first central axis and a second central axis, the first central axis and the first central axis are vertically arranged, the surface of the detection die body is provided with a first graduated scale arranged along the first central axis, and the surface of the detection die body is provided with a second graduated scale arranged along the second central axis.

As a preferable technical solution of the present invention, the first scale and the second scale are made of lead material, the measurement accuracy of the first scale and the second scale is 1mm, wherein the intersection point of the first central axis and the second central axis is used as an origin, and the measurement range of the first scale and the second scale is-200 mm.

In a preferred embodiment of the present invention, the size of the detection phantom is 400mm x 50 mm.

As a preferable technical solution of the present invention, the scale lines at even values on the first scale and the second scale are long, and the scale lines at odd values are short.

As a preferred technical solution of the present invention, a ratio of the length of the scale line at the odd number value to the length of the scale line at the even number value is 1: 1.6.

in a preferred embodiment of the present invention, the second scale and the first scale have a width of 0.3 mm.

As a preferred technical scheme of the invention, the use method of the detection die body is that the detection die body is placed on a treatment bed; the high-precision optical camera is arranged at the head of the radiotherapy equipment and is positioned above the detection die body and the treatment bed

The invention has the beneficial effects that: the method and the device for calibrating and detecting the radiation field convenient to operate open the light field of the radiotherapy equipment, place a specific detection die body on a treatment bed, and adjust the positions of the detection die body and the bed to ensure that the center of the detection die body is positioned at the isocenter of the radiotherapy equipment; then the high-precision optical camera works to collect images, and the system obtains an image I1 of the light field irradiated on the detection die body; the radiotherapy equipment works, and X-ray irradiation is carried out on the detection die body, so that an X-ray image I2 displaying an X-ray field and coordinate scales in the die body can be obtained; the position of the light field in the I1 on the detection die body is analyzed, and the position of the ray field in the I2 on the detection die body is analyzed. The system automatically analyzes the optical image and the X-ray image, and automatically calculates the position of the light field on the detection die body and the position of the X-ray image on the detection die body, thereby calculating the consistency of the light field and the X-ray field (X-ray).

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a detection phantom of a convenient-to-operate field calibration detection method and device thereof.

In the figure: 1. detecting a die body; 2. a first scale; 3. a second scale.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1: a portal calibration detection method convenient to operate,

comprises the following steps of (a) carrying out,

step 1, opening a light field of radiotherapy equipment, placing a specific detection mold body on a treatment bed, and adjusting the positions of the detection mold body and the bed to enable the center of the detection mold body to be located at the isocenter of the radiotherapy equipment;

step 2, working of the high-precision optical camera, collecting images, and obtaining an image I1 of the light field irradiated on the detection die body by the system;

step 3, the radiotherapy equipment works, and the detection die body is irradiated by X rays, so that an X-ray image I2 which displays an X-ray field and coordinate scales in the die body can be obtained;

and 4, analyzing the position of the light field on the detection die body in the I1, and analyzing the position of the ray field on the detection die body in the I2.

The invention adopts the optical imaging and X-ray image comprehensive analysis technology, the high-precision optical camera collects the image of the light field irradiated on the detection die body, and the X-ray detector collects the X-ray image formed after the X-ray field irradiates the detection die body. The system automatically analyzes the optical image and the X-ray image, and automatically calculates the position of the light field on the detection die body and the position of the X-ray image on the detection die body, thereby calculating the consistency of the light field and the X-ray field (X-ray).

The device for implementing the convenient-to-operate portal calibration detection method is shown in fig. 1 and comprises a detection die body 1; the surface of the detection die body 1 is provided with a first central axis and a second central axis, the first central axis and the first central axis are vertically arranged, the surface of the detection die body 1 is provided with a first graduated scale 2 arranged along the first central axis, and the surface of the detection die body 1 is provided with a second graduated scale 3 arranged along the second central axis.

First scale 2 and second scale 3 chi be lead material and make, first scale 2 and second scale 3's measurement accuracy is 1mm, wherein use the nodical of first the central axis and second the central axis as the original point, first scale 2 and second scale 3's measuring range is-200 mm.

The scales at even numbers on the first scale 2 and the second scale 3 are long, and the scales at odd numbers are short. The ratio of the length of the scale mark at the odd number value to the length of the scale mark at the even number value is 1: 1.6, the subsequent image measurement and analysis is convenient to carry out.

The second scale 3 and the first scale 2 are 0.3mm wide.

The using method of the detection die body is that the detection die body is placed on a treatment bed; the high-precision optical camera is arranged at the head of the radiotherapy equipment and is positioned above the detection die body and the treatment couch.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.