CN101907721A - Measurement phantom - Google Patents
Measurement phantom Download PDFInfo
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- CN101907721A CN101907721A CN 201010231219 CN201010231219A CN101907721A CN 101907721 A CN101907721 A CN 101907721A CN 201010231219 CN201010231219 CN 201010231219 CN 201010231219 A CN201010231219 A CN 201010231219A CN 101907721 A CN101907721 A CN 101907721A
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Abstract
The invention discloses a measurement phantom which comprises a phantom body, a movable part and a measurement part capable of being replaced, wherein the phantom body comprises a shell and a first cavity arranged in a first direction; the movable part is a revolved body and can be rotatably arranged in the first cavity and coincide with the first cavity; the movable part is provided with a second cavity arranged in the first direction; and the measurement part is arranged in the second cavity and comprises a measurement plate. In the measurement phantom, the movable part is the revolved body, and the measurement part in the revolved body comprises the measurement plate which can be replaced; a radiation detector can be arranged in the measurement plate; and the measurement plate synchronously rotates along with the revolved body and can measure doses of different directions and the distribution of a dose field in the phantom body, thereby the cost is reduced. The measurement phantom has the advantages of more measurement items, simple structure and easy implementation.
Description
Technical field
The present invention relates to radiotherapy equipment, relate in particular to a kind of measurement phantom that is used for radiotherapy equipment.
Background technology
At present; radiotherapy equipment is according to stereotactic radiotherapy or three-dimensional conformal, Intensity Modulation Radiated Therapy (IMRT) principle; the beam that adopts one or more radioactive sources to produce accurately projects the mode of isocenter point; make local lesion produce biological effect because of the irradiation of beam; protect the health to greatest extent tissue, destroy focus, reach the purpose of treatment disease.During treatment, the isocenter point of radiotherapy equipment should be consistent with the position of focus, the emittance of radioactive source is concentrated in the focus zone, avoid focus surrounding health tissue to be subjected to radiation damage, different patients, focus usually is distributed in different position in the human body, when just requiring radiotherapy equipment to detect, this can simulate the focus of human body diverse location, and the suffered radiation dose of diverse location focus measured, reflection is carried out radiocurable actual conditions to patient, the measurement mechanism of existing radiotherapy equipment, the radiation dose at energy measurement die body center can not be measured the radiation dose of diverse location in the phantom.In order to measure the dose distribution of Different Plane, often need to dispose the phantom of a plurality of different directions photographic films, need frequent the replacing during actual measurement, increased the workload of measuring, also increased cost.
Summary of the invention
The main technical problem to be solved in the present invention is that a kind of measurement phantom that can adapt to multiple dosage measurement demand is provided.
For solving the problems of the technologies described above, the invention provides a kind of measurement phantom, comprise die body, movable part and removable measurement section, described die body comprises shell and first cavity that is provided with on first direction, described movable part is a solid of revolution, and described movable part is arranged in described first cavity rotationally, and it is identical with described first cavity, described movable part has second cavity that is provided with on described first direction, described measurement section is arranged in described second cavity, and described measurement section comprises the measurement plate.
Described shell comprises base, first shell and second shell, and described first shell and described second shell are arranged on the described base opening or closing.
Described first direction is identical with the axis direction of described die body.
Described first cavity, described movable part and the described second cavity coaxial cable.
Described measurement section also comprises backing plate, and described backing plate is used for described measurement plate is arranged on the scheduled measurement position.
One end of described first cavity is provided with the end cap that cooperates with described shell, described movable part and described end cap interlock.
Described die body is oval cylinder, and described shell end face is provided with the angle index line that is used for the position rotating angle, and described movable part is provided with the angle index line that cooperates with described angle index line.
Described end cap is provided with handle.
Described measurement section is full of described second cavity.
Described die body bottom is provided with the mounting interface that cooperates with Medical Devices to be measured.
The invention has the beneficial effects as follows:
In the specific embodiment of the present invention, movable part is a solid of revolution, measurement section in the solid of revolution comprises interchangeable measurement plate, measure in the plate radiation detector can be installed, measure plate along with solid of revolution rotates synchronously, can measure the distribution of the dosage and the dosage field of different directions in the die body, make this phantom can measure by measuring plate at the dose distribution of Different Plane, improve efficiency of measurement, reduced cost; Measurement phantom measurement project of the present invention is many, simple in structure, easy to implement.
Description of drawings
Fig. 1 is the front view in one embodiment of the present invention;
Fig. 2 is the die body in one embodiment of the present invention and the front view of movable part;
Fig. 3 is the front view perpendicular to first direction in the another embodiment of the present invention;
Fig. 4 is the structural representation during with the movable part half-twist among Fig. 3;
Fig. 5 is the cut-open view of Fig. 3;
Fig. 6 is the structural representation of the shell in one embodiment of the present invention;
Fig. 7 is the front view in the second embodiment of the invention;
Fig. 8 is the cut-open view of Fig. 7.
Embodiment
In conjunction with the accompanying drawings the present invention is described in further detail below by embodiment.
Measurement phantom of the present invention is used for the measurement data acquisition and the proof procedure of radiotherapy equipment.Its end user soma equivalent material inserts health-monitoring installation and measures in die body.
To shown in Figure 8, the measurement phantom in one embodiment of the present invention comprises die body 10, movable part 20 and measurement section 30 as Fig. 1.Die body 10 comprises shell 12 and first cavity 11 that is provided with on first direction, movable part 20 is arranged in first cavity 11 rotationally, and the movable part 20 and first cavity 11 coincide.The movable part 20 and first cavity 11 coincide and be meant that movable part 20 can rotate in first cavitys 11, and fit with first cavity 11, and satisfy the requirement of radiography.Movable part 20 has second cavity, 21, the second cavitys 21 that are provided with and is used to be provided with measurement section 30 on first direction, measurement section 30 comprises measures plate 31.Movable part 20 can rotate in first cavity 11, measures plate 31 rotations thereby drive, to change measurement plane.Movable part 20 is a solid of revolution.For the accuracy of dosage measurement, movable part 20 can fully fill up this first cavity 11.This solid of revolution can be right cylinder, round platform or cone.The form fit of the shape of movable part 20 and first cavity 11, first cavity 11 can be the cylinder bodily form, truncated cone-shaped or cone shape.In this embodiment, this solid of revolution is a right cylinder.
In one embodiment, shell 12 comprises that base 123, first shell 121 and second shell, 122, the first shells 121 and second shell 122 are arranged on the base 123, but and open and close.When needs change the measuring position, can open first shell 121 and second shell 122, movable part 20 is turned to the precalculated position after; During measurement, can be with first shell 121 and second shell, 122 closures.
First direction is identical with the axis direction of die body 10.In one embodiment, first direction can be parallel with the axis direction of die body 10, and promptly the axis direction of first cavity 11, movable part 20 and second cavity 21 is parallel; In another embodiment, first cavity 11, movable part 20 and second cavity, 21 coaxial cables.
In one embodiment, measurement section 30 also comprises backing plate 32, and backing plate 32 is used for measurement plate 31 is arranged on the scheduled measurement position.Backing plate 32 can have one or more.Measure top, below or centre that plate 31 can be arranged on backing plate 32,, measurement plate 31 positions are in height changed, so that the precalculated position is measured by adjusting the position of backing plate 32.
In one embodiment, an end of first cavity 11 is provided with end cap 13, and end cap 13 cooperates with shell 12, end cap 13 and movable part 20 interlocks.
In order to simulate trunk better, die body 10 is oval cylinder, and promptly its longitudinal section is oval.If during as head measurement, also die body 10 can be designed to right cylinder or spheroid.
The end face of shell 12 can be provided with angle index line 14, and movable part 20 is provided with angle index line (figure does not show), and the angle index line cooperates with angle index line 14, with the anglec of rotation of indicative of active portion 20.In another embodiment, angle index line 14 can be arranged on the movable part 20, and the angle index line can be provided with the end face of shell 12.
In one embodiment, also can be provided with handle 14 on the end cap 13, with the convenient placement angle of adjusting movable part 20.End cap 13 can be connected by screw with movable part 20, also can end cap 13 and movable part 20 be linked together by handle 14.
In one embodiment, the bottom of die body 10 can also be provided with mounting interface 40, and mounting interface 40 cooperates with Medical Devices to be measured.
In another embodiment, die body 10 belows also can be provided with contiguous block, and contiguous block is fixedlyed connected with mounting interface 40.
Measure in the plate 31 radiation detector can be installed, as: ionization chamber probe, film, thermoluminescence etc., measure plate 31 along with solid of revolution rotates synchronously, can measure the distribution of the dosage and the dosage field of different directions in the die body 10, measure plate 31 and adjust the position by backing plate 32, can measure the distribution of the dosage and the dosage field of a plurality of positions in the die body 10, measure plate 31 through rotating and moving up and down, enlarged the scope of measuring, on a die body 10, can finish a plurality of measurement projects, both reduce cost, saved the time of measuring again, easy to operation.
In the measurement plate 31 that is provided with in the measurement section 30, radiation detector can be installed.Radiation detector comprises ionization chamber, thermoluminescence, film etc., in the present embodiment, measure plate 31 and comprise that can insert the ionization chamber that is provided with the ionization chamber jack measures plate, jack has plurality of specifications, to be fit to the ionization chamber probe or the semiconductor probe of different size, jack position on ionization chamber measurement plate also has a plurality of, to measure the dosage of diverse location.Measure plate 31 and also comprise the film measurement plate that is provided with the thermoluminescent measurement of thermoluminescence plate of insertion and is used to place the measurement film.Be provided with in the measurement of thermoluminescence plate and place thermoluminescent blind hole, film is measured plate and is provided with the magazine of placing film.Backing plate 32 is measured plate, measurement of thermoluminescence plate and film measurement plate with ionization chamber and is had identical physical dimension.
Die body 10, movable part 20, measurement section 30, mounting interface 40 and end cap 13 can be made by the water equivalent material, and this water equivalent material has the density of working as with water.This water equivalent material is a polystyrene, also can adopt polymethylmethacrylate, is commonly called as other equivalent materials such as organic glass.
Before the measurement phantom of use present embodiment carries out the radiotherapy equipment measurement, to measure phantom earlier is installed on the therapeutic bed, the center of die body 10 is overlapped with measuring basis, be installed on the measurement plate 31 of measurement section 30 according to required measurement project choice radiation detector, now as follows by measurement project division:
When measuring dose value, ionization chamber is measured plate to be inserted in second cavity 21, the ionization chamber of measuring dosage inserts ionization chamber and measures in the plate, adjust the position that ionization chamber is measured plate by backing plate 32, thereby determine the position of ionization chamber measurement point, also can rotary moveable portion 20 to the angle that needs, determine the position of ionization chamber measurement point, the cross sectional representation when Fig. 4 illustrates according to one embodiment of the invention the movable part half-twist; After ionization chamber is fixing, open the beam of radiotherapy equipment, irradiation is measured the ionization chamber in the phantom, reads the radiation dose data, along with the difference of the position of ionization chamber measurement point, can measure the radiation dose of diverse location.
When measuring the dosage field distribution, the film of measuring the dosage field distribution is fixed on film to be measured in the magazine of plate, film is measured plate and is inserted in second cavity 21, adjusts the position that films are measured plates by backing plate 32, also can rotary moveable portion 20, change film and measure the angle of film in the plate, after determining the film measuring position, open the beam of radiotherapy equipment, irradiation is measured the film in the phantom, handle and data processing by film, read the data of radiation dose field distribution.
When measuring synthesis precision, comprise two processes of location scanning and parameter measurement:
In the location scanning process, to measure phantom earlier and the positioning mark device is installed on the therapeutic bed, positional precision is measured plate and is inserted in second cavity 21, adjust the position that positional precision is measured plate by backing plate, to measure phantom again, positioning mark device and therapeutic bed are put into CT image scanning equipment together and are carried out image scanning, obtain the positioning image that has identification point, precision measure plate center, position identification point presents the round dot of black in the positioning image, the treatment planning systems of radiotherapy equipment is according to the data of identification point in the location scanning image, determine to measure the position of the round dot of black in the plate, and calculate to measure and get the coordinate figure of this position in the treatment coordinate system in the phantom, and provide quantitative radiation dose parameter and corresponding radiotherapy equipment controlled variable thereof, controlled variable is imported the control system of radiotherapy equipment.
In the parameter measurement process, comprise integrated location precision measure and comprehensive accuracy of dose measurement:
When carrying out the integrated location precision measure, the film of measuring position precision is fixed in the positional precision measurement plate, positional precision is measured the position of plate reduction when location scanning, start radiotherapy apparatus and carry out irradiation, handle and data processing by film, read center, irradiation dose field and positional precision and measure the deviation at plate center, the gained parameter is the integrated location precision of radiotherapy equipment;
Carrying out comprehensive accuracy of dose when measuring, measure plate with ionization chamber and replace positional precision measurement plate, the ionization chamber probe is inserted ionization chamber to be measured in the plate, the position of ionization chamber measurement point is overlapped with the position that positional precision is measured plate center identification point, start radiotherapy apparatus and carry out irradiation, the quantitative radiation dose parameter that actual emanations dose value and treatment planning systems by the ionization chamber probe measurement provides compares, obtain the radiation dose deviation at place, ionization chamber probe position, the gained parameter is the comprehensive accuracy of dose of radiotherapy equipment;
In like manner, adjust positional precision and measure the position of plate, change the position of measurement point, the process of duplicate measurements synthesis precision, can measure the integrated location precision and the comprehensive accuracy of dose of radiotherapy equipment beam focusing center different measuring point in measuring phantom, reflected the actual situation of accepting radiation of patient in radiation therapy, for precise radiotherapy provides guarantee.
In the specific embodiment of the present invention, shell comprises base, first shell and second shell, first shell and second shell are arranged on the base opening or closing, when needs rotate movable part, can open first shell and second shell, movable part is turned to the precalculated position, when testing, can closed first shell and second shell, reduced the wearing and tearing between shell and the movable part, prolonged the serviceable life of measuring phantom effectively.In the specific embodiment of the present invention, measure plate and adjust the position by backing plate, can measure the distribution of the dosage and the dosage field of a plurality of positions in the die body, position through rotation and traverse measurement plate, enlarge the scope of measuring, on a phantom, can finish a plurality of measurement projects, both reduced cost, saved the time of measuring again, easy to operation.In the specific embodiment of the present invention, die body is oval cylinder, can simulate the trunk of human body more accurately, measures multinomial data; The shell end face is provided with the angle index line, and end cap is provided with angle written instructions line, can adjust the anglec of rotation of movable part easily.In the specific embodiment of the present invention, end cap is provided with handle, by handle rotary moveable body easily.In the specific embodiment of the present invention, die body bottom is provided with mounting interface, and mounting interface cooperates with Medical Devices to be measured, is user-friendly to.
Above content be in conjunction with concrete embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. measurement phantom, it is characterized in that, comprise die body (10), movable part (20) and removable measurement section (30), first cavity (11) that described die body (10) comprises shell (12) and is provided with on first direction, described movable part (20) is a solid of revolution, described movable part (20) is arranged in described first cavity (11) rotationally, and it is identical with described first cavity (11), described movable part (20) has second cavity (21) that is provided with on described first direction, described measurement section (30) is arranged in described second cavity (21), and described measurement section (30) comprises measures plate (31).
2. measurement phantom as claimed in claim 1, it is characterized in that, described shell (12) comprises base (123), first shell (121) and second shell (122), and described first shell (121) and described second shell (122) are arranged on the described base (123) opening or closing.
3. measurement phantom as claimed in claim 1 is characterized in that, described first direction is identical with the axis direction of described die body (10).
4. measurement phantom as claimed in claim 3 is characterized in that, described first cavity (11), described movable part (10) and described second cavity (21) coaxial cable.
5. measurement phantom as claimed in claim 1 is characterized in that, described measurement section (30) also comprises backing plate (32), and described backing plate (32) is used for described measurement plate (31) is arranged on the scheduled measurement position.
6. as any described measurement phantom in the claim 1 to 5, it is characterized in that an end of described first cavity (11) is provided with the end cap (13) that cooperates with described shell (12), described movable part (20) and described end cap (13) interlock.
7. measurement phantom as claimed in claim 6, it is characterized in that, described die body (10) is oval cylinder, described shell (12) end face is provided with the angle index line (14) that is used for the position rotating angle, and described movable part (20) is provided with the angle index line that cooperates with described angle index line (14).
8. measurement phantom as claimed in claim 6 is characterized in that, described end cap (12) is provided with handle (13).
9. as any described measurement phantom in the claim 1 to 5, it is characterized in that described measurement section (30) is full of described second cavity (21).
10. as any described measurement phantom in the claim 1 to 5, described die body (10) bottom is provided with the mounting interface (40) that cooperates with Medical Devices to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010231219 CN101907721A (en) | 2010-07-19 | 2010-07-19 | Measurement phantom |
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| CN 201010231219 CN101907721A (en) | 2010-07-19 | 2010-07-19 | Measurement phantom |
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| CN101907721A true CN101907721A (en) | 2010-12-08 |
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| CN 201010231219 Pending CN101907721A (en) | 2010-07-19 | 2010-07-19 | Measurement phantom |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274588A (en) * | 2011-05-25 | 2011-12-14 | 深圳市一体医疗科技股份有限公司 | method and system for controlling radiation dose |
| CN103353602A (en) * | 2013-07-19 | 2013-10-16 | 北京中康联医疗器械开发有限公司 | Multifunctional measuring mold body |
| CN103698795A (en) * | 2013-12-10 | 2014-04-02 | 广州医科大学附属肿瘤医院 | Irradiation dose detecting body mold for high-dose-rate short-range treatment radioactive source |
| CN106061554A (en) * | 2013-09-11 | 2016-10-26 | E·T·帕帕斯 | System and method for patient-specific radiotherapy treatment verification and quality assurance |
| CN106950589A (en) * | 2017-03-30 | 2017-07-14 | 中国核动力研究设计院 | A kind of device for being detected to radioactive ray |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274588A (en) * | 2011-05-25 | 2011-12-14 | 深圳市一体医疗科技股份有限公司 | method and system for controlling radiation dose |
| CN103353602A (en) * | 2013-07-19 | 2013-10-16 | 北京中康联医疗器械开发有限公司 | Multifunctional measuring mold body |
| CN103353602B (en) * | 2013-07-19 | 2017-12-01 | 北京中康联医疗器械开发有限公司 | Multifunctional measuring die body |
| CN106061554A (en) * | 2013-09-11 | 2016-10-26 | E·T·帕帕斯 | System and method for patient-specific radiotherapy treatment verification and quality assurance |
| US10238892B2 (en) | 2013-09-11 | 2019-03-26 | Evangelos T. Pappas | System and method for patient-specific radiotherapy treatment verification and quality assurance system |
| CN106061554B (en) * | 2013-09-11 | 2019-07-02 | E·T·帕帕斯 | The system and method for the treatment of verifying and quality assurance for the dedicated radiotherapy of patient |
| CN103698795A (en) * | 2013-12-10 | 2014-04-02 | 广州医科大学附属肿瘤医院 | Irradiation dose detecting body mold for high-dose-rate short-range treatment radioactive source |
| CN103698795B (en) * | 2013-12-10 | 2016-08-31 | 广州医科大学附属肿瘤医院 | A kind of Effect of HDR Brachytherapy radiation source dose measurement body mould |
| CN106950589A (en) * | 2017-03-30 | 2017-07-14 | 中国核动力研究设计院 | A kind of device for being detected to radioactive ray |
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Application publication date: 20101208 |