Medical linear accelerator KV/MV coaxial X ray image system

Abstract

The invention discloses a medical linear accelerator KV/MV coaxial X ray image system, belonging to the medical linear accelerator research and manufacture field. The invention provides a medical linear accelerator KV/MV coaxial X ray image system which guarantees a KV level image system to be in a same coordinate axis with MV level radiotherapy ray while collecting images with quality equivalent to the quality of images obtained through a conventional medical X ray image device, which is an image guiding radiotherapy goal pursued by industries at home or aboard and still not finished. The main points of the invention are that a KV level high voltage generator which is exclusive for a regular X ray image device is provided for the medical linear accelerator, and original pulse high voltage or adjustable KV level image high voltage can be freely switched for the electronic emission system through the "high voltage seamless converting circuit" so as to realize the technology of accuracy radiotherapy therapy under coaxial high definition image guiding.

Description

1. Technical field [0001] The invention relates to a design scheme of a "KV / MV coaxial X-ray image system" integrated on a medical electron linear accelerator, which belongs to the field of medical linear accelerator research and manufacture. 2. Background technology [0002] 1 Overview: [0003] The history of medical radiation therapy has been more than 100 years. In the 1950s, there was a medical electron linear accelerator, which marked the gradual maturity of modern tumor radiation therapy equipment and radiation therapy technology. However, early medical electron linear accelerators can only output low-energy single-photon radiation. When performing radiation therapy on tumors in patients, they usually perform perspective positioning on a "simulation positioning machine" with KV-level X-ray perspective function in advance, and then The corresponding position of the skin is marked, and then the patient is asked to perform repeated positioning treatment on the accelera...

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Problems solved by technology

It is reported that the actual effect is that the image beam current is not lower than 700KV, and the voltage range is not adjustable, which is obviously not comparable to conventional X-ray imaging equipment that can be adjusted from tens of KV to more than one hundred KV. Therefore, the image quality is comparable to that of conventional X-ray The imaging equipment is incomparable, and the clinical effect is unsatisfactory

In addition, this solution is only applicable to low-energy single-photon medical linear accelerators. Even if the image quality is clinically acceptable, it is difficult to compare with Elekta or Varian's modern high-energy medical electron linear accelerators with two-photon bands and multiple electron beams. Therefore, the clinical significance is not obvious, and it is difficult to form a market competitive advantage at home and abroad

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