Compact rotary rack used for proton therapy

Abstract

The invention relates to a compact rotary rack used for proton therapy. The rack is provided with a deflection magnet with a magnetic field gradient, the deflection magnet is composed of first deflection magnet bodies and second deflection magnet bodies, two quadrupole iron blocks used for optical matching are mounted between the first deflection magnet bodies, and four quadrupole iron blocks usedfor optical matching are mounted between the first deflection magnet bodies and the second deflection magnet bodies, wherein at least the second deflection magnet bodies are of segmental structures,and the gradients of the segments are different. According to the compact rotary rack used for the proton therapy, the size of the rotary rack is reduced, the weight of the rotary rack is decreased, more convenience is provided for manufacturing and installation, and the production cost and operating power consumption are reduced.

Description

technical field [0001] The present invention relates to proton therapy, and more particularly to a compact rotating gantry for proton therapy. Background technique [0002] Radiation therapy using protons has proven to be a precise and conformal radiation therapy technique capable of delivering high doses of protons to the target area while minimizing the dose to surrounding healthy tissue. [0003] A proton therapy device includes an accelerator for generating high-energy protons and a transport line for delivering a beam of protons to a target from multiple radiation directions. The rotating gantry is a known support mechanism for rotating beam delivery lines, and the target is positioned at a fixed position defined by the intersection of the axis of rotation of the rotating gantry and the central axis of the exit of the last deflection magnet, which is also defined by called the isocenter. [0004] The traditional rotating frame structure such as Figure 1a and 1b As s...

AI Technical Summary

Problems solved by technology

However, since the scheme adopts the scanning magnet installed before the last deflection magnet, the last deflection magnet has a large gap and is extremely heavy, which leads to an insignificant reduction in the total weight of the entire rotating frame

[0006] CN201720221304.X proposes an optimized structure of a compact rotating frame, which uses a structure of three deflection magnets, which makes the weight of the rotating part heavier, and the gap between the second and third deflection magnets will also increase the length of the rotating frame

In addition, the longer treatment head makes its SAD larger, resulting in a larger rotation radius, which greatly increases the weight of the rotating gantry

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