Four-dimensional tracking radiotherapy system

Abstract

The invention provides a four dimensional tracking radiotherapy system which belongs to the field of radiotherapy equipment. The system comprises a tumor trajectory extraction system. A trajectory tracking accelerator is arranged. The trajectory tracking accelerator is provided with a therapy head. The therapy head is provided with a two-level collimator, a two dimensional moving mechanism and a multi leaf collimator. A drive motor is horizontally arranged on the side of the two-level collimator. A controller is arranged in the motor. The signal receiving end of the controller is connected with the tumor trajectory extraction system, and the signal transmitting end is connected with the drive motor. A linear guide rail is horizontally arranged on the side of the two-level collimator. A joint block is arranged below the drive motor. The joint block is connected with the multi leaf collimator. The middle part of the joint block is arranged in the linear guide rail. A ball screw is arranged on a rotor of the drive motor. The top of the joint block is matched with the multi leaf collimator. The four dimensional tracking radiotherapy system has high precision, enables a patient to be prevented from breath holding, has the advantages of no tumor actual motion information deviation and short therapy time, and enables the patient to be prevented from panic.

Description

technical field [0001] The invention provides a four-dimensional tracking radiotherapy system, which belongs to the field of radiotherapy equipment. Background technique [0002] When performing radiotherapy for lung cancer and liver cancer, the respiratory movement of the lung organs will cause the movement of the target area. In order not to miss the tumor target area, the irradiation field must be enlarged. As a result, the volume of normal tissue irradiation increases, and the possibility of radiation pneumonitis or radiation hepatitis increases, which limits the increase in radiotherapy dose. In order to overcome the adverse effect of respiratory exercise on tumor radiotherapy, breathing control technology has been applied and promoted in the field of tumor radiotherapy. So far, commonly used breathing control technologies include: passive pressurization technology, active breathing control technology, and respiratory gating technology , real-time tracking radiation te...

AI Technical Summary

Problems solved by technology

The passive pressurization technique is simple and easy, but the disadvantage is that the precision of this method is poor

[0008] At present, the defects of this technology are: first, the precision of passive pressurization technology is poor; Accompanied by respiratory symptoms, the tolerance is poor; third, it is difficult to keep consistent in time and space between the tumor movement of the respiratory gating system and the external monitoring signal, which will cause a certain deviation in obtaining the actual movement information of the tumor; Fourth, the real-time tracking of radiation technology is intermittent during the irradiation process, which prolongs the entire treatment time; fifth, the respiratory movement error compensation method bed movement will cause panic in the patient, and the patient will produce incidental changes during the movement, making the movement control complicated

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