Three-dimensional dose measurement and detection system of particle therapy device

Abstract

The invention relates to a three-dimensional dose measurement and detection system of a particle therapy device. The three-dimensional dose measurement and detection system comprises a detector main body, a front-end electronics system, a data acquisition device and an upper computer, wherein the detector main body is used for detecting a particle beam; the front-end electronics system is used foramplifying an ionization signal generated by the detector body; the data acquisition device is used for acquiring signals amplified by the front-end electronics system; a particle photographing system and a three-dimensional dose reconstruction system are arranged in the upper computer; the particle photographing system is used for obtaining an imaging result of a target through a pre-trained machine network model by adopting data synchronously sampled before and after the target; and the three-dimensional dose reconstruction system performs three-dimensional dose reconstruction based on a pre-measured beam parameter dose curve model according to the imaging result of the target and the dose distribution information of the beam passing through the targets with different thicknesses to obtain the three-dimensional dose distribution of the beam passing through the target.

Description

technical field [0001] The invention relates to the technical field of proton and carbon ion treatment of tumors, in particular to a three-dimensional dose measurement detection system of a particle therapy device. Background technique [0002] The technology of using protons and carbon ions to treat tumors is a tumor treatment method with remarkable curative effect and great development potential. Its use in radiation therapy has both biological advantages and dose distribution advantages Bragg peak (most of the ion energy is deposited at the end of the range), which can ensure high precision (millimeter level), high efficacy and high safety in clinical radiation therapy sex. At present, the number of particle therapy devices is increasing rapidly all over the world, and related technologies are also changing with each passing day. [0003] The advantage of particle therapy is that it can precisely control the dose of particles to the tumor location, and the dose deposite...

AI Technical Summary

Problems solved by technology

However, the nonlinearity of the light intensity and dose of the luminous dose measurement system used is relatively obvious, and both need to be corrected, so the accuracy of the measurement results will also be limited.

In addition, this system cannot be directly used for 3D dose distribution measurement, and can only be QA through the verification of specific positions

IBA's MatriXX PT can be used to measure 2D and 3D dose distribution, but the 3D measurement is reconstructed on the basis of the 2D results measured at different times, which will be affected by the uniformity of beam scanning and the change of beam parameters at different times

[0005] To sum up, there is currently no detection system that can be used clinically in the prior art to directly measure the three-dimensional dose through real-time sampling. It is used in the QA detection system of the particle therapy device.

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