Radiotherapy equipment, and multi-blade grating and blade structure thereof

Abstract

The invention provides radiotherapy equipment, and a multi-blade grating and a blade structure thereof. The blade structure comprises a plurality of blades arranged along a first direction and a plurality of first driving mechanism connected with the plurality of blades in a one-by-one corresponding manner, the blades are arranged in an extending manner along a second direction, the second direction is vertical to the first direction, the quantity of the blades corresponds to the quantity of the first driving mechanisms, each first driving mechanism comprises a first screw arranged along the second direction, a first nut arranged on the first screw in a sleeved manner, and a first driving motor connected with the first nut, the first screw is connected with the corresponding blade, and thefirst driving motor drives the first nut to rotate so that the first screw is enabled to move along the second direction relative to the first nut to drive the corresponding blade to move along the second direction. The nuts are driven to rotate and the screws and the blades are driven to move through the motors so that the blades can move to different positions, radiation fields in different shapes are formed, conformal treatment of tumors is realized, the transmission mode is more stable and reliable, the lubrication is facilitated, and the difficulty for machining and design can be reduced.

Description

Technical field [0001] The invention relates to the technical field of medical imaging equipment, in particular to radiotherapy equipment, multi-leaf gratings and their leaf structures. Background technique [0002] As a local treatment for tumors, radiotherapy aims to kill tumor cells with radiation, and at the same time, by increasing the dose of the target area, reducing the radiation damage to the normal tissues around the target area, controlling side effects, and improving survival rate and quality of life. In order to prevent normal tissues and organs from being damaged by radiation, the methods generally used in clinical practice include: 1) Treatment planning system: When formulating a treatment plan, according to a certain strategy to optimize the dose distribution, when sufficient dose is irradiated to the tumor target area At the same time, it reduces the radiation exposure to normal tissues. 2) Conformal treatment: forming a field with a clear boundary that is consi...

AI Technical Summary

Problems solved by technology

[0003] However, the current multi-leaf grating, because the blades are thin and the driving distance is long, will affect the rigidity of the blade transmission mechanism, it is difficult to ensure the position accuracy, and the machining accuracy is extremely high

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