Three-dimensional dosage verification apparatus and method thereof

A three-dimensional dose and verification device technology, applied in measurement devices, dosimeters, electrostatic dosimeters, etc., can solve the problems of limited dose accuracy in the verification range, large system errors, and high costs, and achieve fast switching measurement, small system errors, low cost effect

Active Publication Date: 2015-08-26
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
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Problems solved by technology

[0009] 1. In the absolute dose verification of the radiotherapy plan, the position of the ionization chamber cannot be changed after it is inserted into the solid phantom, and the metal electrodes of the ionization chamber will affect the CT electron density curve (CT water equivalent coefficient curve) of the phantom, so the verification range and the measured Point

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  • Three-dimensional dosage verification apparatus and method thereof
  • Three-dimensional dosage verification apparatus and method thereof
  • Three-dimensional dosage verification apparatus and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Example 1: See figure 1 , figure 2 , A three-dimensional dose verification device, which includes a computer control platform 5, a multi-channel electrometer 7 with a three-dimensional dose measuring head 1, and a three-dimensional water phantom (water tank) 8 with a three-dimensional motion support arm 9; the computer control platform 5 is connected to many The channel electrometer 7 and the three-dimensional water phantom (water tank) 8; the multi-channel electrometer 77 is connected to the three-dimensional dose measuring head 1; the three-dimensional water phantom (water tank) 8 is fixed to the three-dimensional motion arm 9; the three-dimensional dose measuring head 1 is fixed to Three-dimensional motion on the arm. The computer control platform is connected to the three-dimensional dose measuring head through a multi-channel electrometer to form a measurement function; the computer control platform controls the three-dimensional dose measuring head to move in space...

Embodiment 2

[0061] Example 2: See image 3 , A three-dimensional dose verification method, its main feature is that the steps include:

[0062] S1. The computer control system obtains the to-be-verified three-dimensional planned dose distribution generated by the treatment planning system (TPS);

[0063] S2. The computer control system 5 controls the three-dimensional movement arm of the water phantom to move the three-dimensional dose measuring head 1 composed of the ionization chamber 3 and the three-dimensional ionization chamber fixture 2 to the position of interest, and obtain the three-dimensional coordinate values ​​corresponding to each ionization chamber 3;

[0064] S3. The computer control system 5 interpolates the three-dimensional planned dose based on the three-dimensional coordinates of the ionization chamber 3, and obtains the planned dose distribution of a sphere with a center radius of 3 mm at the point of interest;

[0065] S4. Perform irradiation according to the planned irradia...

Embodiment 3

[0073] Example 3: See Figure 4 In the method for three-dimensional dose verification, the step 300 difference analysis module includes the following steps:

[0074] S10. The computer control system controls the acquisition of the three-dimensional coordinate value corresponding to each point of interest;

[0075] S20. Interpolate the three-dimensional planned dose to obtain the point of interest as the planned dose distribution of a sphere with a center radius of 3mm;

[0076] S30. The computer control system obtains the measured dose corresponding to each point of interest through the three-dimensional measuring device;

[0077] S40. Calculate the difference in measured dose to the point of interest based on the planned dose and its coordinates in the sphere;

[0078] S50. Obtain the minimum gamma value after each calculation point in the sphere is traversed and calculated, that is, the three-dimensional gamma factor of this point of interest;

[0079] S60. Determine whether the calcul...

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Abstract

The invention relates to a three-dimensional dosage verification apparatus. The apparatus comprises a computer control platform, a multichannel electrometer provided with a three-dimensional dosage measuring head and a three-dimensional water body provided with a three-dimensional motion support arm; a computer control platform is connected with the multichannel electrometer and the three-dimensional water body; the multichannel electrometer is connected with the three-dimensional dosage measuring head; the three-dimensional water body is fixedly connected with the three-dimensional motion support arm; the three-dimensional dosage measuring head is fixedly connected with the three-dimensional motion support arm; the computer control platform is connected with the three-dimensional dosage measuring head through the multichannel electrometer to form a measuring function; and the computer control platform controls the three-dimensional dosage measuring head to perform space translational motion through the three-dimensional motion support arm. The invention provides a multimode three-dimensional measuring apparatus based on the water body and an ionization chamber detector, and a radiation treatment plan three-dimensional verification apparatus and method based on a heavy ion stereo measuring method and a three-dimensional gamma factor analysis method. The functions are diversified, the operation is convenient, the verification result is visual and accurate, the efficiency is high, the cost is low, and the system errors are small.

Description

Technical field [0001] The invention relates to a three-dimensional dose verification device and a three-dimensional dose verification method. Background technique [0002] With the rapid development of computer technology, radiological imaging technology and radiotherapy technology have undergone fundamental and revolutionary changes, and radiotherapy has entered a new era-the era of three-dimensional therapy. Especially recently, with the update of radiotherapy equipment and the increase of medical units carrying out radiotherapy, medical linear accelerators with electric multileaf collimator (MLC) have been widely used; they also have three-dimensional algorithms and adjustments. Intensity modulated radiation therapy (IMRT) treatment plan system (treatment plan system, TPS) is widely used, which promotes the development of three-dimensional conformal therapy technology, especially intensity modulated radiation therapy technology. The proportion of IMRT cases is increasing, an...

Claims

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Application Information

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IPC IPC(8): A61N5/10G01T1/185G01T1/161G01T1/14
Inventor 戴中颖李强马圆圆申国盛刘新国贺鹏博黄齐艳闫渊林
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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