Method for measuring photon beam energy spectrum of medical accelerator

Abstract

This invention discloses a medical accelerator measuring the photon beam spectroscopy method. steps are as follows: a. measuring medical accelerator exit collimator system in the three-dimensional photon beam dose distribution in water, access to data; b. Application different Monte Carlo method a number of group single-energy photon beam in the water to the dose distribution data; c. establishment of single-energy photon beam dose distribution in the water, the photon beam spectroscopy and measurement data between the dose of linear equations; by measuring the photon beam d. Die dose in the water data, the results of the application of energy photon beam weighted algorithm to solve linear equations available photon beam spectroscopy; advantage of this invention is: only in measuring photon beam dose distribution in water tanks, software reuse of this invention to be a photon beam spectroscopy data, the use of fast simpler; all radiotherapy units have radiotherapy water tanks, the invention will enable hospitals measured photon spectrum-free purchase equipment, reduce cost measurement; not photon spectrometer radiotherapy simplified the process and improve the efficiency of the treatment.

Description

technical field [0001] The invention relates to a method for measuring the photon beam energy spectrum of a medical accelerator in radiotherapy. The measurement of these energy spectrum data is the basis of the photon beam precise radiotherapy technology. Background technique [0002] Radiation therapy is one of the main means of treating cancer. In order to further improve the cure rate of radiation therapy, the development of a new generation of radiation therapy technology characterized by precise control of the dose of radiation beams is the key. Ordinary radiation therapy is directly based on the dose data measured by the rectangular field photon beam in the water model, and the simple human body density correction is used to estimate the dose of the photon beam in the human body. For precise radiation therapy techniques such as conformal and intensity-modulated radiation therapy, large errors are unacceptable. In order to accurately place a high dose of photon beam on...

AI Technical Summary

Problems solved by technology

Traditionally, a group of nuclear instruments (such as a multi-channel photon spectrometer) can be used to measure the photon beam energy spectrum, but such a measurement system is quite complicated and expensive, and the measurement system has a great influence on the on-site layout of medical accelerators to treat patients. In addition, the measurement work is time-consuming and interferes with clinical treatment, which is time-consuming and labor-intensive, which is deeply inconvenient for the hospital.

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