Multi-channel ionization chamber and collector of medical linear accelerator

Abstract

The invention provides a collecting electrode of a multi-channel ionization chamber of a medical linear accelerator. The collecting electrode comprises a first collecting part, multiple second collecting parts and a protective ring; the first collecting part is positioned in the centre; the multiple second collecting parts surround the first collecting part on the plane; the multiple second collecting parts are separated from the first collecting part; and the protective ring is provided with a first part surrounding the periphery of the multiple second collecting parts on the plane and a second part for separating any two adjacent collecting parts. The invention further provides the multi-channel ionization chamber of the medical linear accelerator.

Description

Technical field

[0001] The present invention mainly relates to radiotherapy equipment, in particular to the ionization chamber of a medical linear accelerator and its collector.Background technique

[0002] Systems used to emit high-energy radiation beams, such as linear accelerators, can be used in areas such as providing radiotherapy. For example, a linear accelerator emits a cone of radiation, which can be an electron beam or a photon (for example, X-ray) beam. When used to provide radiotherapy, the emitted beam will be conformed to a shape that basically fits the diseased tissue, so as to minimize the side effects on the surrounding healthy tissue. In radiotherapy, patients with different conditions usually have different dose prescriptions. Small doses will lead to poor treatment effects, and larger doses will have safety risks. Therefore, the accuracy of dose is very important. Usually, the ionization chamber is used as the main component to monitor and control the output dose of th...

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