Medical proton synchrotron

Abstract

The invention relates to a medical proton synchrotron which comprises the components of a first deflecting two-pole magnet, a second deflecting two-pole magnet, a third deflecting two-pole magnet, a fourth deflecting two-pole magnet, a fifth deflecting two-pole magnet, a sixth deflecting two-pole magnet, a seventh deflecting two-pole magnet and an eighth deflecting two-pole magnet, wherein the deflecting two-pole magnets are successively connected, and furthermore the first deflecting two-pole magnet is connected with the eighth deflecting two-pole magnet for forming an annular structure; a first long linear junction, a second long linear junction, a third long linear junction, a fourth long linear junction; a first miniature linear junction, a second miniature linear junction, a third miniature linear junction and a fourth miniature linear junction. According to the medical proton synchrotron, through utilizing the deflecting two-pole magnets with ultrahigh field strength and horizontal focusing and horizontal defocusing four-pole magnets, an envelope function is kept in a relatively low level, and furthermore the medical proton synchrotron has advantages of effectively improving acceptance degree of the proton synchrotron, increasing number of stored protons, increasing proton utilization rate and duty ratio, and shortening treatment time. Furthermore each magnet element in the medical proton synchrotron has relatively high strength for reducing perimeter of the whole synchrotron, thereby effectively utilizing the space of the medical proton synchrotron and furthermore reducing treatment cost.

Description

technical field [0001] The invention relates to a medical proton synchrotron for tumor treatment. Background technique [0002] The excellent Bragg peak characteristics of proton in the depth direction make it one of the most advanced methods in tumor treatment. At present, there are more and more proton therapy devices and treatment centers in the world. The most advanced scanning technology used in the treatment is to use scanning magnets in the horizontal direction to form a precise scanning coverage of the proton beam drawn out by the accelerator in strict accordance with the pattern determined in advance, and the accuracy can reach the sub-millimeter level. (Scanning magnets, etc. are installed on the treatment head) before energy adjustment. The above-mentioned scanning technology can realize the precise treatment of three-dimensional conformal intensity modulation, and maximize the radiotherapy requirement that the radiation dose in the target area is as large as pos...

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Problems solved by technology

However, the current existing proton synchrotrons (such as patent documents 201210115044.X, 201010252492.5, etc.) do not consider the above-mentioned new technology when designing specific magnets and power supplies, so that the number of stored particles is small, and the The number of energy layers that can be drawn out in each cycle is small (for example, the treatment of a 1L tumor generally requires 3X10 11 particles, while the number of stored particles in existing proton synchrotrons is only 4-8X10 10 left and right), so even with the above-mentioned technique, the actual reduction in treatment time is not much

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