Multi-leaf collimator for tomotherapy and dynamic intensity-modulated radiotherapy and its control method

Abstract

The invention provides a multi-blade collimator for tomotherapy and dynamic intensity modulated radiation therapy and the control method of the multi-blade collimator. The multi-blade collimator comprises multiple pairs of blades, a guide rail frame, a plurality of linear motors, a sensor and a controller, wherein the inner ends of two blades in each pair are opposite to each other along the longitudinal direction of the blade; a plurality of parallel guide rails are arranged in the guide rail frame, and the multiple pairs of blades are respectively movably arranged in the plurality of guide rails; the plurality of linear motors are respectively connected with the blades in a one-to-one correspondence way to drive the blades to move along the guide rails; the sensor is used for detecting a position and a speed of each blade; and the controller is connected with the linear motors and the sensor. Thus, the multi-blade collimator can be matched with a tomotherapy accelerator and can also be matched with an ordinary dynamic intensity modulated radiation therapy accelerator, so that the using range of the multi-blade collimator is expanded, the investment of a hospital on equipment is reduced, and the economical burden of a patient is indirectly lightened.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a multi-leaf collimator for tomotherapy and dynamic intensity-modulated radiotherapy and a control method thereof. Background technique [0002] The fundamental purpose of external beam radiation therapy is to form an effective dose in the tumor target area while reducing the adjacent normal tissue dose. Initially, a small number of basic shapes such as circles and squares are used to modulate the beam, but for most tumor target areas, this method is very likely to cause excessive irradiation of normal tissues. Later, Conformal Radiotherapy (Conformal Radiotherapy) appeared, the fundamental purpose of which is to adapt the dose distribution to the shape of the tumor. Among them, three-dimensional conformal radiotherapy (3-Dimensional Conformal Radiotherapy, 3DCRT) uses multiple field directions, and ensures that the target area in each field direction is compatible wit...

AI Technical Summary

Problems solved by technology

[0009] In the application of the above-mentioned multi-leaf collimator, a single multi-leaf collimator can only realize one of the binary switch motion state or the continuous motion state, so the multi-leaf collimator has a narrow application range and cannot change the radiation therapy method according to the treatment plan. Increased hospital investment, thus indirectly increasing the burden on patients

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