Radiation device for radiation therapy and radiation method therefor

Abstract

The invention discloses a radiotherapy radiation device and a radiation method thereof, comprising: a source body (2), a pre-collimation body (4), a helmet (7), a driving component and a treatment couch (12), a source body (2) The rays of multiple radiation sources (3) are radially focused on a common focal point (20) on the central axis of the radiation device, the source body (2) and the pre-collimation body (4) are respectively connected with the driving components, and the pre-collimation body The pre-collimator (5) on (4) and the final collimator (8) on the helmet (7) have the same distribution law as the radioactive source (3), and the helmet (7) is connected to the pre-collimator (4) by a positioning connection mechanism. ) docking as a whole, so that the pre-collimator (5) in the pre-collimator (4) is aligned with one of the final collimators (8), and the helmet (7) is connected to the treatment bed (12) through the bearing (9). )superior. The radiation method is system initialization, making the pre-collimation body (4) and the helmet (7) to the initial zero position, position selection and docking to realize radiation therapy. The advantage is that the radioactive source (3) has high focusing precision and good therapeutic effect.

Description

technical field [0001] The invention relates to a radiotherapy radiation device and a radiation method thereof. Background technique [0002] The radiation therapy device adopts the working principle of rotating focus. In the existing radiation device, multiple radiation channels are distributed on the rotating source body, and there are radiation sources and pre-collimators in the radiation channels. The pre-collimator inside the source body is equipped with multiple groups of collimators with different apertures. Each group of collimators is distributed in the same way as the radiation channels on the source body. The apertures are focused on a common focal point, which lies on the axis of rotation of the source and collimator. Chinese patent CN1126622A discloses "A Method and Radiation Unit for Changing Radiation Beam Diameter", which is a method and radiation unit for changing radiation beam diameter in medical radiotherapy equipment. There are radioactive sources and ...

AI Technical Summary

Problems solved by technology

Its shortcoming is that since the rotary motion of the source body and the collimator are respectively driven by two sets of transmission parts, during the process of rotating and focusing, the center of the inner hole of the pre-collimator on the source body and the collimator on the collimator cannot be separated. Keeping the alignment, the center of the radiation channel of the radiation source is not in a straight line, which affects the focusing accuracy of the rays of the radiation source on the common focus, making the actual radiation dose value of the lesion less than the dose value given by the treatment plan, and increasing the radiation exposure The distribution of the dose field deviates from the distribution of the dose field given by the treatment plan, thereby reducing the treatment effect

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