CN117045985B - Measuring tool for radiotherapy equipment and using method - Google Patents
Measuring tool for radiotherapy equipment and using method Download PDFInfo
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- CN117045985B CN117045985B CN202311015484.2A CN202311015484A CN117045985B CN 117045985 B CN117045985 B CN 117045985B CN 202311015484 A CN202311015484 A CN 202311015484A CN 117045985 B CN117045985 B CN 117045985B
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- 238000001959 radiotherapy Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005855 radiation Effects 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 abstract description 4
- 238000010894 electron beam technology Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001926 lymphatic effect Effects 0.000 description 1
- 210000000920 organ at risk Anatomy 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
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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
- A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
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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
- A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Radiation-Therapy Devices (AREA)
Abstract
The application provides a measuring tool for radiotherapy equipment and a using method thereof, which relate to the technical field of medical equipment and comprise a positioning component and a measuring component, the measuring assembly is detachably arranged on the positioning assembly and extends in a direction away from the positioning assembly, the measuring assembly is provided with a detection cavity along the length direction of the measuring assembly, an opening of the detection cavity is positioned at one end of the measuring assembly, which is close to the positioning assembly, and the bottom of the detection cavity is provided with a coordinate mark. The measuring tool for the radiotherapy equipment provided by the application can be used for one of calibration of a standard alignment state of a treatment head of the radiotherapy equipment, treatment head alignment error detection or radiation beam axis deviation measurement. The alignment accuracy of the radiotherapy equipment is effectively ensured, so that the normal tissues of a patient can be protected in the treatment process, and the treatment target area is ensured to be irradiated with enough dose.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a measuring tool for radiotherapy equipment and a using method thereof.
Background
The radiation therapy in operation refers to a therapeutic method which fully exposes the tumor bed, residual focus, surrounding lymphatic drainage area and other parts in operation, moves the organs at risk to the irradiation field as much as possible, and carries out single large-dose irradiation under direct vision so as to kill tumor cells to the maximum extent and prevent or reduce the radiation damage of normal tissues.
During treatment, a treatment head for generating radiation is docked with a beam limiting device at the patient's focus. However, in the actual radiotherapy process, if there is a mechanical error in the alignment state of the treatment head at the treatment position, there is a deviation between the actual position and the expected position of the beam axis of the radiation beam. If the deviation is large, the treatment effect may be reduced and normal tissues may be damaged.
Disclosure of Invention
The application aims to provide a measuring tool for radiotherapy equipment and a using method thereof, which are used for solving the defects in the prior art.
To achieve the above object, in a first aspect, the present application provides a measurement tool for a radiotherapy apparatus, comprising:
A positioning assembly; and
The measuring assembly is detachably arranged on the positioning assembly and extends in a direction away from the positioning assembly, a detection cavity is formed in the measuring assembly along the length direction of the measuring assembly, an opening of the detection cavity is positioned at one end, close to the positioning assembly, of the measuring assembly, and a coordinate mark is arranged at the bottom of the detection cavity;
Wherein the opening is for a positioning pointer for measurement to pass through and for a radiation beam generated by the radiotherapy apparatus to enter.
As a further improvement of the above technical scheme:
With reference to the first aspect, in one possible implementation manner, the measurement assembly includes:
the top cover is detachably arranged on the positioning assembly, and the opening is formed in the top cover;
The supporting structure is arranged on the top cover and extends in a direction away from the positioning assembly; and
The bottom plate set up in bearing structure keeps away from the one end of top cap, the bottom plate bearing structure with form between the top cap detect the chamber, be equipped with on the bottom plate the coordinate sign.
With reference to the first aspect, in one possible implementation manner, a cylindrical first groove is formed on one side, close to the top cover, of the bottom plate, the coordinate mark is arranged at the bottom of the first groove, and the origin of the coordinate mark coincides with the center of the bottom of the groove.
With reference to the first aspect, in a possible implementation manner, the measuring tool for a radiotherapy apparatus includes the positioning pointer, one end of the positioning pointer is used for being connected with a treatment head of the radiotherapy apparatus, and the other end of the positioning pointer is inserted into the opening and extends to the tank bottom.
With reference to the first aspect, in one possible implementation manner, the support structure is a hollow column casing.
With reference to the first aspect, in a possible implementation manner, the positioning assembly includes:
The middle part of the positioning guide plate is provided with a mounting hole for accommodating the measuring assembly; and
The fasteners are arranged on the positioning guide plate and are used for fixing the measuring assembly in the mounting hole.
With reference to the first aspect, in a possible implementation manner, the fasteners are arranged along a radial direction of the mounting hole;
The measuring assembly comprises a top cover arranged in the mounting hole, a second groove is formed in the outer peripheral surface of the top cover, and the fastener is used for extending into the second groove and propping against the bottom of the second groove.
With reference to the first aspect, in a possible implementation manner, a notch portion corresponding to the fastener is further provided on an outer periphery of the top cover.
To achieve the above object, in a second aspect, the present application also provides a method for using a measurement tool for a radiotherapy apparatus, the method comprising: calibration of the standard alignment state of the treatment head of the radiation treatment apparatus, treatment head alignment error detection or radiation beam axis deviation measurement is performed using the measurement tool for the radiation treatment apparatus provided according to the first aspect described above.
With reference to the second aspect, in a possible implementation manner, the calibration of the standard alignment state of the treatment head of the radiotherapy apparatus includes connecting the positioning pointer to the treatment head of the radiotherapy apparatus, and aligning the positioning pointer to the center of the coordinate mark, where the radiation beam axis coincides with the central axis of the applicator, to be in the standard alignment state.
With reference to the second aspect, in one possible implementation manner, the treatment head alignment error detection of the radiotherapy apparatus includes:
connecting the positioning pointer to a treatment head of the radiotherapy device;
positioning the radiotherapy apparatus with a measurement tool;
and after the positioning is finished, observing the position pointed by the positioning pointer to the coordinate mark, so that the positioning deviation value, namely the mechanical error of the alignment, can be read.
With reference to the second aspect, in one possible implementation manner, the radiation beam axis deviation measurement includes:
firstly removing the positioning pointer;
Setting a radiation sensitive film on the bottom of the detection cavity, and marking the position of the coordinate identification center on the radiation sensitive film;
then outputting a preset radiation dose through the treatment head;
And (3) scanning gray data on the radiation sensitive film, converting the gray data into dosage data, analyzing the dosage data to obtain projection of a radiation beam axis at the bottom of the detection cavity, and measuring the distance between the projection of the radiation beam axis at the bottom of the detection cavity and the coordinate identification center to obtain the beam axis deviation condition.
Compared with the prior art, the application has the beneficial effects that:
The application provides a measuring tool for radiation therapy equipment and a using method thereof, wherein the measuring tool for radiation therapy equipment comprises a positioning component and a measuring component, the measuring component is detachably arranged on the positioning component and extends towards a direction far away from the positioning component, the measuring component is provided with a detection cavity along the length direction of the measuring component, an opening of the detection cavity is positioned at one end of the measuring component, which is close to the positioning component, and the bottom of the detection cavity is provided with a coordinate mark.
The positioning pointer is connected with the treatment head and used for representing the beam axis center of the radiation beam when the standard alignment state of the treatment head of the radiation treatment equipment is calibrated, so that the positioning pointer is aligned with the center of the coordinate mark at the bottom of the detection cavity, and the beam axis of the radiation beam coincides with the central axis of the applicator at the moment to be in the standard alignment state.
When the alignment error of the therapeutic head of the radiotherapy equipment is detected, the positioning pointer is connected with the therapeutic head to position the measuring tool for the radiotherapy equipment, and the position marked by the coordinate pointed by the positioning pointer is observed after the positioning is finished, so that the positioning deviation value, namely the mechanical error of the alignment, can be read. When the beam axis deviation of the radiation beam is measured, the positioning pointer is removed, a radiation sensitive film is arranged at the bottom of the detection cavity, then a preset radiation dose is output through the treatment head, gray data on the radiation sensitive film are scanned and converted into dose data, the projection of the beam axis of the radiation beam at the bottom of the detection cavity is obtained through analysis of the dose data, and the distance between the projection position of the beam axis at the bottom of the detection cavity and the coordinate identification center is measured to obtain the beam axis deviation condition.
Therefore, the measuring tool for the radiotherapy equipment provided by the application can be used for one of calibration of the standard alignment state of the treatment head of the radiotherapy equipment, treatment head alignment error detection or radiation beam axis deviation measurement. The alignment accuracy of the radiotherapy equipment is effectively ensured, so that the normal tissues of a patient can be protected in the treatment process, and the treatment target area is ensured to be irradiated with enough dose.
Additional features and advantages of the application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate only certain embodiments of the application and, therefore, should not be considered as limiting the scope, since it is possible to obtain other related drawings from the drawings without inventive step by those of ordinary skill in the art. In the drawings:
Fig. 1 is a schematic perspective view of a measurement tool for radiotherapy equipment according to an embodiment of the present application;
FIG. 2 shows a top view of the measurement tool for the radiation therapy device shown in FIG. 1;
FIG. 3 shows a schematic view of a part of the construction of the connection of the measuring tool for the radiotherapy apparatus shown in FIG. 1 with the treatment head of the radiotherapy apparatus;
FIG. 4 shows a schematic perspective view of a positioning assembly in the measurement tool for the radiation therapy device shown in FIG. 1;
FIG. 5 shows a schematic perspective view of a measurement assembly in the measurement tool for the radiation therapy device shown in FIG. 1;
FIG. 6 shows a schematic perspective view of a top cover of the measuring assembly of FIG. 5;
FIG. 7 is a schematic perspective view of a positioning pointer in the measuring tool for the radiation therapy apparatus shown in FIG. 1;
FIG. 8 is a schematic diagram of the structure of a measurement tool for a radiation therapy device according to an embodiment of the present application when the measurement tool is used for calibration of a standard alignment state of a therapy head;
fig. 9 is a schematic diagram of a measurement tool for a radiation therapy device according to an embodiment of the present application when the beam axis deviation of a radiation beam is measured.
Reference numerals illustrate:
10. a treatment head;
100. a positioning assembly; 110. positioning a guide plate; 111. a mounting hole; 112. a feature identification member; 120. a fastener;
200. A measurement assembly; 210. a top cover; 211. an opening; 212. a second groove; 213. a notch portion; 220. a support structure; 221. a column casing; 221a, a hollowed-out opening; 230. a bottom plate; 231. a first groove; 232. a coordinate mark;
300. positioning a pointer; 310. a fixing member; 320. a pointer member; 321. a needle tip; 330. a positioning rod; 331. a disc;
400. A beam axis of the radiation beam.
Detailed Description
The following describes the detailed implementation of the embodiments of the present application with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
In the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The application will be described in detail below with reference to the drawings in connection with exemplary embodiments.
Examples
Referring to fig. 1,2 and 3, the present embodiment provides a measuring tool for a radiotherapy apparatus, which can be used for calibration of standard alignment state of a treatment head of the radiotherapy apparatus, treatment head alignment error detection or beam axis deviation measurement.
In this embodiment, the measurement tool for a radiation therapy device includes a positioning assembly 100 and a measurement assembly 200. Wherein, the positioning assembly 100 can be placed on an external support. The measuring assembly 200 is detachably disposed on the positioning assembly 100 and extends in a direction away from the positioning assembly 100, the measuring assembly 200 is provided with a detection cavity along its length direction, an opening 211 of the detection cavity is located at one end of the measuring assembly 200 near the positioning assembly 100, and a coordinate identifier 232 is disposed at the bottom of the detection cavity (see fig. 5).
Alternatively, the coordinate mark 232 may be a printed coordinate scale or a coordinate scale engraved at the bottom.
Further, in taking measurements, the radiotherapy apparatus is arranged vertically with the measurement tool and the positioning assembly 100 is arranged close to the treatment head 10 of the radiotherapy apparatus, wherein an opening 211 in the measurement assembly 200 is available for the positioning pointer 300 for measurement to pass through and the radiation beam generated by the radiotherapy apparatus to enter.
Referring also to FIG. 4, in particular, the positioning assembly 100 includes a positioning guide 110 and a plurality of fasteners 120. The middle part of the positioning guide plate 110 is provided with a mounting hole 111 for accommodating the measuring assembly 200, and the mounting hole 111 is matched with the accommodating measuring assembly 200. A plurality of fasteners 120 are disposed on the positioning guide 110, the plurality of fasteners 120 being used to secure the measurement assembly 200 in the mounting hole 111. When the measuring assembly 200 needs to be disassembled, the fastening piece 120 is released from fixing the measuring assembly 200.
Referring to fig. 1, 2, 4 and 5, the measuring assembly 200 includes a top cover 210, a support structure 220 and a bottom plate 230. The top cover 210 is disposed in the mounting hole 111 of the positioning guide plate 110, and the top cover 210 is matched with the size of the mounting hole 111. In this embodiment, the top cover 210 has a disc structure, and the top cover 210 is disposed in the mounting hole 111 and fixed by the fastener 120, and ensures that the center of the mounting hole 111 is located on the axis of the top cover 210. The top cover 210 is secured by fasteners 120 to achieve a removable connection of the top cover 210 to the positioning guide 110.
The top cover 210 is provided with the opening 211. The opening 211 is sized for passage of the positioning pointer 300 and passage of the radiation beam.
Alternatively, the shape of the opening 211 may be circular, polygonal, or other shapes.
Referring to fig. 6, further, the outer peripheral surface of the top cover 210 is provided with a second groove 212, and the fastener 120 is used to extend into the second groove 212 to abut against the bottom of the second groove 212. It can be appreciated that providing the second groove 212 on the outer peripheral surface of the top cover 210 has the following effects: the first aspect may facilitate positioning and installation of the fastener 120 on the positioning guide 110 for the top cover 210; in the second aspect, when the fastener 120 does not fully abut against the bottom of the second groove 212, the top cover 210 can be rotated relative to the positioning guide 110 to adjust the position, thereby improving the convenience of installation.
In some embodiments, the outer periphery of the top cover 210 is also provided with a notched portion 213 corresponding to the fastener 120. The notch 213 may allow a space to be formed between the positioning guide 110 and the top cover 210, through which it is possible to observe whether the fastener 120 extends into the second recess 212, thereby making the judgment more intuitive.
Referring to fig. 2 and 4, further, the fasteners 120 are at least three, the at least three fasteners 120 synchronously abut against the top cover 210, and the at least three fasteners 120 are distributed along the circumference of the mounting hole 111. It can be appreciated that the top cover 210 is abutted with the stabilization of the triangle, thereby improving the stability of the top cover 210 disposed in the mounting hole 111.
Optionally, at least three fasteners 120 are distributed around the circumference of the mounting hole 111, and further, at least three fasteners 120 are uniformly distributed around the circumference of the mounting hole 111.
In this embodiment, three fasteners 120 are provided on the positioning guide 110. Each of the fasteners 120 is arranged in a radial direction of the mounting hole 111. That is, the fastener 120 abuts one end of the top cover 210 toward the center of the mounting hole 111.
The support structure 220 is disposed on the top cover 210 and extends away from the positioning assembly 100, and in particular, the support structure 220 is located on a side of the top cover 210 away from the treatment head 10.
The bottom plate 230 is disposed at an end of the supporting structure 220 away from the top cover 210, wherein a detection cavity is formed among the bottom plate 230, the supporting structure 220 and the top cover 210, and a coordinate mark 232 is disposed on the bottom plate 230. Further, the base plate 230 is also used to hold a radiation sensitive film when the beam axis deviation measurement is performed.
In this embodiment, the distance from the bottom plate 230 to the top cover 210 is consistent with the clinical light limiting barrel length to ensure the accuracy of the measurement.
Further, in the present embodiment, a cylindrical first groove 231 is disposed on a side of the bottom plate 230 near the top cover 210, a coordinate mark 232 is disposed at a bottom of the first groove 231, and an origin of the coordinate mark 232 coincides with a center of a circle of the bottom of the first groove 231.
The measuring tool for the radiotherapy apparatus comprises the positioning pointer 300, one end of the positioning pointer 300 is used for being connected with the treatment head 10 of the radiotherapy apparatus, and the other end is inserted into the opening 211 and extends to the bottom of the first groove 231.
Referring to fig. 1, 5 and 7, in particular, the positioning pointer 300 includes a fixing member 310 and a pointer member 320. Wherein, the fixing member 310 is used for connecting with the treatment head 10, and the pointer member 320 is disposed on the fixing member 310. Further, the fixing member 310 is perpendicular to the pointer member 320. Thus, when the fixing member 310 is connected to the treatment head 10, the pointer member 320 can be made to coincide with the beam direction of the radiation beam of the treatment head 10.
In the present embodiment, the pointer member 320 in the positioning pointer 300 extends into the first groove 231 and is close to the groove bottom. That is, the needle tip 321 of the pointer 320 points to the coordinate mark 232 of the groove bottom.
The support structure 220 may alternatively be a hollow cylindrical member 221 (see fig. 5), or the support structure 220 may be other means for providing support and connection between the base 230 and the top 210. Wherein, a plurality of hollowed holes 221a are arranged on the outer circumferential surface of the cylindrical barrel 221 so as to be convenient for observing the condition of a detection cavity formed inside the cylindrical barrel 221.
Referring to fig. 1 to 7, further, the present embodiment also provides a method for using the measuring tool for radiotherapy equipment, and the measuring tool for radiotherapy equipment provided in the present embodiment is applied. The application method comprises the following steps: the measurement tool for the radiotherapy equipment is used for calibrating the standard alignment state of the treatment head of the radiotherapy equipment, detecting the alignment error of the treatment head or measuring the beam axis deviation of the radiation beam.
Referring to fig. 8, in the calibration of the standard alignment state of the treatment head 10 of the radiotherapy apparatus:
s100: a positioning pointer 300 is connected to the treatment head 10, the positioning pointer 300 being used to represent the centre of the beam axis 400 of the radiation beam.
S110: positioning pointer 300 is aligned with the center of coordinate marking 232 on base plate 230, where beam axis 400 coincides with the applicator center axis, in a standard alignment state.
Of course, in some embodiments, the pointer 320 may be replaced with a structure that combines the positioning rod 330 and the disc 331 when the standard alignment state of the treatment head 10 of the radiotherapy apparatus is calibrated (refer to fig. 8), one end of the positioning rod 330 is connected to the treatment head 10 through the fixing element 330, the other end is connected to the disc 331, and the disc 331 is placed in the first groove 231 when calibrated, and the radiation beam axis 400 coincides with the central axis of the applicator in the standard alignment state.
Wherein when performing a treatment head 10 alignment error detection of a radiation treatment apparatus:
s200: the positioning pointer 300 is connected to the treatment head 10.
S210: positioning a measurement tool for the radiation therapy device.
The positioning can be performed by a visual positioning system of the radiotherapy equipment. Firstly, an image control unit in a visual positioning system is moved to a best suitable shooting position above a positioning guide plate 110; then acquiring current image information of the feature identifiers 112 on the positioning guide 110; the treatment head 10 of the radiation treatment apparatus is controlled to move to a target position on the positioning guide 110 based on the currently acquired image information.
Further, the feature recognition element 112 may be a special pattern or a special shape that is convenient to recognize, and is directly sprayed or embedded on the positioning guide 110. Alternatively, the feature identifier 112 may be a block-shaped structure, using a black ring+white inner charge. The image control unit comprises an image shooting camera which is in communication connection.
S220: after the positioning is completed, the position of the positioning pointer 300 pointing to the coordinate identifier 232 is observed, and a measuring tool is used to measure the distance between the position of the pointer 300 and the position of the central point of the coordinate identifier 232, wherein the distance is the positioning deviation value, i.e. the mechanical error of alignment.
Referring to fig. 9, in making a beam axis deviation measurement:
S300: the positioning pointer 300 is removed first.
S310: a radiation sensitive film is disposed on the base 230 and the location of the center of the coordinate mark 232 is marked on the radiation sensitive film.
S320: a preset radiation dose is then output by the treatment head 10.
It is understood that the radiation beam generated by the treatment head 10 may be an electron beam or X-rays. Taking electron beam as an example, the energy and dose rate are fixed in fixed gear. Where radiation sensitive films are used, where the deviation of the emitted electron beam is measured, it is necessary that the film is subjected to a certain irradiation. The dose of this radiation is such that the radiation sensitive film is developed.
S330: and then scanning gray data on the radiation sensitive film by a scanner, converting the gray data into dose data, analyzing the dose data to obtain projection of the radiation beam axis 400 on the bottom plate 230, and measuring the distance between the projection of the beam axis on the bottom plate 230 and the coordinate identification center to obtain the deviation condition of the radiation beam axis 400.
Specifically, a scanner is used to analyze the gray distribution of the radiation sensitive film to obtain a circular dose distribution, the gray distribution or the dose distribution is analyzed to obtain the projection position of the radiation beam axis 400 on the bottom plate 230, and the distance between the projection of the radiation beam axis 400 on the bottom plate 230 and the coordinate identification center is measured according to the position relationship between the radiation sensitive film and the coordinate center, so as to obtain the deviation condition of the radiation beam axis 400.
Thus, the measuring tool for the radiotherapy equipment provided by the embodiment can be used for one of calibration of a standard alignment state of a treatment head of the radiotherapy equipment, treatment head alignment error detection or radiation beam axis deviation measurement. The alignment accuracy of the radiotherapy equipment is effectively ensured, so that the normal tissues of a patient can be protected in the treatment process, and the treatment target area is ensured to be irradiated with enough dose.
The foregoing details of the optional implementation of the embodiment of the present application have been described in conjunction with the accompanying drawings, but the embodiment of the present application is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present application within the scope of the technical concept of the embodiment of the present application, where all the simple modifications belong to the protection scope of the embodiment of the present application.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
In addition, any combination of various embodiments of the present application may be performed, so long as the concept of the embodiments of the present application is not violated, and the disclosure of the embodiments of the present application should also be considered.
Claims (4)
1. A measurement tool for a radiation therapy device, comprising:
A positioning assembly (100); and
The measuring assembly (200) is detachably arranged on the positioning assembly (100) and extends in a direction away from the positioning assembly (100), the measuring assembly (200) is provided with a detection cavity along the length direction of the measuring assembly, an opening (211) of the detection cavity is positioned at one end, close to the positioning assembly (100), of the measuring assembly (200), and the bottom of the detection cavity is provided with a coordinate mark (232);
wherein the opening (211) is used for a positioning pointer (300) for measurement to pass through and a radiation beam generated by the radiotherapy equipment to enter;
The measurement assembly (200) comprises:
the top cover (210) is detachably arranged on the positioning assembly (100), and the opening (211) is formed in the top cover (210);
A support structure (220) disposed on the top cover (210) and extending away from the positioning assembly (100); and
The bottom plate (230) is arranged at one end, far away from the top cover (210), of the supporting structure (220), the detection cavity is formed among the bottom plate (230), the supporting structure (220) and the top cover (210), and the coordinate mark (232) is arranged on the bottom plate (230);
A cylindrical first groove (231) is formed in one side, close to the top cover (210), of the bottom plate (230), the coordinate mark (232) is arranged at the bottom of the first groove (231), and the origin of the coordinate mark (232) coincides with the center of the bottom of the groove;
The measuring tool for the radiotherapy equipment comprises the positioning pointer (300), wherein one end of the positioning pointer (300) is used for being connected with a treatment head (10) of the radiotherapy equipment, and the other end of the positioning pointer is inserted into the opening (211) and extends to the bottom of the groove.
2. The measurement tool for a radiation therapy device according to claim 1, wherein the support structure (220) is a hollow cylindrical member (221).
3. The measurement tool for a radiation therapy device according to claim 1, wherein the positioning assembly (100) comprises:
A positioning guide plate (110), the middle part of which is provided with a mounting hole (111) for accommodating the measuring assembly (200); and
And a plurality of fasteners (120) are arranged on the positioning guide plate (110), and the fasteners (120) are used for fixing the measuring assembly (200) in the mounting holes (111).
4. A method of using a measurement tool for a radiation therapy device, the method comprising: calibration of the standard alignment state of a treatment head of a radiation treatment apparatus, treatment head alignment error detection or radiation beam axis deviation measurement is performed using a measurement tool for a radiation treatment apparatus according to any one of claims 1 to 3;
calibration of the standard alignment state of the treatment head of the radiation treatment device comprises:
-connecting the positioning pointer (300) to a treatment head (10) of the radiotherapy apparatus;
Aligning the positioning pointer (300) to the center of the coordinate mark (232), wherein the beam axis (400) of the radiation beam coincides with the central axis of the applicator, and the positioning pointer is in a standard alignment state;
The treatment head alignment error detection of the radiotherapy apparatus comprises:
-connecting the positioning pointer (300) to a treatment head (10) of the radiotherapy apparatus;
positioning the radiotherapy apparatus with a measurement tool;
After the positioning is finished, the position of the coordinate mark (232) pointed by the positioning pointer (300) is observed, so that a positioning deviation value, namely, the mechanical error of alignment, can be read;
the radiation beam axis deviation measurement includes:
-removing the positioning pointer (300);
Setting a radiation sensitive film on the bottom of the detection cavity, and marking the position of the center of the coordinate mark (232) on the radiation sensitive film;
then outputting a preset radiation dose through the treatment head (10);
And (3) scanning gray data on the radiation sensitive film, converting the gray data into dose data, analyzing the dose data to obtain projection of a radiation beam axis (400) on the bottom of the detection cavity, and measuring the distance between the projection of the radiation beam axis (400) on the bottom of the detection cavity and the coordinate identification center to obtain the deviation condition of the beam axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311015484.2A CN117045985B (en) | 2023-08-11 | 2023-08-11 | Measuring tool for radiotherapy equipment and using method |
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| CN116474278A (en) * | 2023-04-25 | 2023-07-25 | 陕西华明普泰医疗设备有限公司 | High-precision automatic centering method for treatment head |
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| CN113599718A (en) * | 2021-06-15 | 2021-11-05 | 苏州普能医疗科技有限公司 | Radiotherapy positioner based on diagnostic image |
| CN215084371U (en) * | 2021-06-22 | 2021-12-10 | 广西中医药大学第一附属医院 | Adjustable positioning mechanism for radiotherapy equipment |
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| CN115068834A (en) * | 2021-03-15 | 2022-09-20 | 湖南华创医疗科技有限公司 | Radiotherapy apparatus |
| CN116474278A (en) * | 2023-04-25 | 2023-07-25 | 陕西华明普泰医疗设备有限公司 | High-precision automatic centering method for treatment head |
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