Radiation therapy equipment and radiotherapy system therewith

Abstract

The invention discloses radiation therapy equipment and a radiotherapy system therewith. The radiation therapy equipment comprises a fixed machine, a swivel bracket, a ray source, a main collimator and a multi-leaf collimator, wherein the swivel bracket can be rotatably arranged on the fixed machine around the central axis of the swivel bracket, the main collimator is disposed on the ray source arranged on the swivel bracket, and the multi-leaf collimator is fixed on the fixed machine. The multi-leaf collimator, the ray source and the main collimator are positioned on the same side of the swivel bracket, wherein the ray source and the main collimator are located outside the multi-leaf collimator in the radial direction. The multi-leaf collimator comprises a plurality of vane groups arranged in a circular around the central axis, each vane group comprises two vanes relative to each other in the direction parallel to the central axis, and the two vanes are capable of relatively moving in the direction parallel to the central axis. The multi-leaf collimator of the radiation therapy equipment can be in a quasi-static mode, and effectiveness and efficiency of the treatment of the radiation therapy equipment can be greatly improved.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a radiotherapy equipment and a radiotherapy system with it. Background technique [0002] In the field of malignant tumor treatment, the main treatment methods currently used include surgery, radiotherapy and chemotherapy. The ideal goal of tumor radiotherapy is that the dose to the tumor target area meets the requirements of the treatment plan, while normal tissues are protected from dose damage. However, due to the inherent physical properties of radiotherapy, adjacent tissues inevitably suffer radiation doses. In the continuous development of radiotherapy equipment, the emergence of intensity-modulated radiotherapy has changed the bottleneck of conformal radiotherapy technology in the past, increased the scope of clinical application of equipment, improved the accuracy of tumor radiotherapy, and made radiotherapy equipment more versatile. Higher treatment efficiency and trea...

AI Technical Summary

Problems solved by technology

[0005] However, the installation position of this direct-mounted multi-leaf collimator is relatively close to the position of the ray source, and the blades are relatively thin under the same resolution requirements, which increases the processing accuracy of the blades and makes processing difficult

Moreover, the mass of the rotating parts of the directly attached multi-leaf collimator is large, and the dose calculation of the device in the process of formulating the treatment plan needs to consider the reciprocating motion of the leaves when they rotate with the frame, which increases the difficulty of calculation

At the same time, due to the difference in motion performance between the leaves of the multi-leaf collimator, it is easy to produce deviations between the commanded motion speed and position and the actual motion, which reduces the spatial dose projection accuracy

In addition, due to the relatively complicated control of the blade random frame rotation, the power control signals of the drive unit must be transmitted through the brush slip ring, so a large part of the reliability and stability of the equipment depends on the quality of the brush slip ring, which increases the cost and complexity of the equipment. sex

In addition, the multi-leaf collimator is composed of high-density tungsten alloy, which has a large hanging mass, which hinders the improvement of the dynamic performance of the rotating gantry, and is difficult to meet the clinical needs of non-continuous rotating small-angle intensity-modulated radiotherapy for special tumor diseases

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