Method and system for real-time monitoring proton or heavy ion radiotherapy doses

Abstract

The invention relates to a method and a system for real-time monitoring proton or heavy ion radiotherapy heavy particle radiotherapy doses. The monitoring method utilizes distribution information of positron radionuclide produced during the high-energy proton or heavy ion radiotherapy, and measures position and energy information of annihilation photons in the intermittent time of beams according to beam cycles of protons or heavy ions to obtain dose deposition spatial distributions in the proton or heavy ion radiotherapy, thereby realizing the monitoring of dose distributions of proton or heavy ion beams. Compared with the traditional instantaneous gamma measurement method, the method has a higher detection efficiency, and the method effectively reduces statistical noise, and improves accuracy of the dose deposition of the proton or heavy ion radiotherapy; compared with the traditional positron emission tomography method, the method can realize a faster one-dimensional distribution of dose along the beam direction by carrying out a collimation treatment on the annihilation photons along the beam direction and then detecting the position and energy information of the photons, thus the method is conducive to improving monitoring efficiency.

Description

technical field [0001] The invention relates to the technical field of nuclear medicine imaging, in particular to a method and system for real-time monitoring of proton or heavy ion radiotherapy dose. Background technique [0002] Radiation therapy for tumors is a local treatment method for treating tumors with radiation. Commonly used radiation includes γ-rays produced by cobalt-60, X-rays and electron beams produced by accelerators, and proton beams and electron beams with good curative effects reported in recent years. carbon ion beam. During proton or heavy ion radiotherapy, the dose of the Bragg peak at the end of the range is three or four times greater than the dose at the entrance, and the dose after the end of the range is extremely small. This feature not only maximizes the dose at the tumor, but also effectively Protect normal tissue before and after the tumor. [0003] A single-energy proton beam delivers the maximum dose at the same range, and tumors of differ...

AI Technical Summary

Problems solved by technology

[0004] The traditional monitoring method for proton or heavy ion radiotherapy dose is to use prompt gamma measurement method or positron emission tomography method, but the monitoring process of traditional monitoring method is complicated, and the monitoring efficiency and monitoring accuracy are low

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