High-resolution automatic beam detecting device and method thereof

Abstract

The invention provides a high-resolution automatic beam detecting device and a method thereof, wherein the device comprises a housing. Two side walls of the housing are respectively provided with a scintillator fluorescent screen and a beam preventer which face each other. The housing is internally provided with a reflector and a CCD camera which is used for detecting light that is transmitted from the scintillator fluorescent screen and is reflected by a reflector. A finger type ionization chamber is inserted into the beam preventer. The finger type ionization chamber is connected with an electrometer. According to the device and the method, distribution and dosage of the beam for clinic treatment at an isocenter can be automatically obtained through one-time beam irradiation, thereby efficiently ensuring acquisition of daily QA data before clinical treatment, reducing pollution of an environment in a treatment chamber by residual beam, and performing a radiation protecting function accordingly. The device and the method can realize the detecting means and the detecting method for performing high-resolution imaging and beam and dosage verification and protection by QA equipment ina small-dimension irradiation field.

Description

technical field [0001] The invention relates to the field of beam current detection, in particular to a high-resolution automatic beam current detection device and method. Background technique [0002] It is well known that protons have particular advantages in the treatment of eye and head tumors. Due to its unique Bragg peak dose distribution, a steep high-dose (energy loss) peak is finally formed at the end of the range, so that the normal tissue at the tumor edge receives only a small dose of irradiation, so it is widely used in eye tumors and head Tumor treatment. Usually before the treatment, the parameters of the treatment beamline need to be collected and subjected to daily QA (quality assurance) verification and analysis. [0003] Typically, for proton / heavy ion beamlines that treat eye or head tumors, film is used to measure the distribution and dose of the beam at the isocenter. However, this method can only be used for qualitative analysis and not for quantita...

AI Technical Summary

Problems solved by technology

In addition, when the beam passes through film or other imaging materials, it has no blocking effect on the beam itself, and cannot reduce the environmental pollution of the residual beam to the treatment room

[0004] At present, there is no method in the market that can automatically obtain the distribution and dose of the beam at the isocenter before clinical treatment through one beam irradiation, so as to efficiently ensure the acquisition of daily QA data before clinical treatment, and at the same time It can also reduce the pollution of the residual beam to the treatment room environment, thus playing the role of radiation protection

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