Tumor patient positioning system based on proton imaging

Abstract

The invention discloses a tumor patient positioning system based on proton imaging. The tumor patient positioning system comprises three fixed racks, two treatment heads, an image guiding subsystem, apatient supporting subsystem, a respiratory movement management subsystem, and a patient transferring device. The two treatment heads are respectively a scanning beam and a scattering beam; the tumorpositioning and radiotherapy system based on proton imaging is compact in structure, high in precision and easy and convenient to operate, the size and cost are reduced, the cost is reduced, and theservice efficiency is improved; the invention discloses the tumor positioning and radiotherapy system based on proton imaging, an advanced MLC / compensator coordinate system is adopted as a two-dimensional coordinate system independent of a beam coordinate system, the origin of coordinates is defined at the center of a beam, and when the MLC / compensator rotates anticlockwise in the positive direction and theta c is equal to 0 degree, the +xc axis coincides with the +xb axis. The water equivalent length calculation formula needs to consider the value of theta c so as to obtain the position of each point of the compensator in the patient coordinate system.

Description

technical field [0001] The invention belongs to the field of patient positioning, and relates to a tumor patient positioning technology, in particular to a tumor patient positioning system based on proton imaging. Background technique [0002] Tumor, as one of the diseases that seriously threaten human life, has become a key and difficult issue in global research. The photon beams such as X-rays used in traditional radiation therapy will inevitably damage the vicinity of the tumor due to its physical dose distribution. The normal tissue, not only causes side effects, but also often limits the radiation dose and reduces the cure rate, which can no longer meet the needs of patients. In this regard, the medical community continues to explore cutting-edge cancer treatment technologies. As one of the international frontier cancer treatment technologies, neutron, proton and heavy ion technology have brought hope to cancer patients. Among them, with the development of computer te...

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Problems solved by technology

[0003] Although the superiority of proton therapy has been recognized by the world, at present, my country's proton therapy system is mainly imported from abroad, the core technology depends on foreign countries, the cost of procurement and maintenance is very high, and there are three major difficulties in building a treatment center: the cost is extremely expensive, accounting for Large area, long construction time

These difficulties lead to high final treatment costs, which most patients cannot afford, so it is difficult to popularize and promote the use of proton therapy for tumor treatment

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