Respiratory control locating device for breast tumor radiotherapy

Abstract

The invention provides a respiratory control locating device for breast tumor radiotherapy. The locating body rack of the device is an approximate case body with a hollowed rear wall, a case inner wall comprising a front wall, a left wall, a right wall, an upper wall and a lower wall of the case body is connected with a latex water bag, the upper wall, the lower wall and the front wall of the case body can be regulated in respective axial directions, a liquid control device is communicated with the water bag through a case body wall, the port of a suction device is positioned on the inner side of the water bag, a sub-controller is arranged on the case body, a main controller is respectively connected with the suction device, the liquid control device and the sub-controller, the case body is a carbon fiber case body, the water bag is internally connected with f the front wall, the left wall, the right wall, the upper wall and the lower wall of the case body through a plurality of connecting points, the suction device comprises a suction pump and a gas delivery pipe connected with a gas valve, and the liquid control device comprises a liquid pump, a liquid delivery pipe connected with the liquid pump and a water container communicated with the liquid delivery pipe.

Description

Technical field: [0001] The present invention relates to medical equipment, and more specifically to a breathing control positioning device that can be used for radiotherapy of thoracic tumors with large respiratory motion. Background technique: [0002] Precise radiotherapy requires the target area to receive high-dose radiation while ensuring that the absorbed dose of normal tissues around the target area is reduced as much as possible to maximize the tumor treatment gain ratio. However, for chest and abdomen tumors, the position of the tumor is constantly changing due to breathing movement, which leads to uncertainty in the positioning of the irradiation target area during tumor radiotherapy. At present, if the control of the respiratory motion of the tumor target area is not considered, then when formulating a general three-dimensional conformal plan or a three-dimensional intensity modulation plan on a routine basis, it can only be based on the boundary of the CTV (clinical ...

AI Technical Summary

Problems solved by technology

However, the acquisition time of 4DCT images is much longer (3 to 5 times) than that of diagnostic CT, which inevitably increases the X-ray dose of patients.

In addition, respiratory movement is a semi-autonomous movement, and multiple respiratory cycle CT scans are required to acquire 4DCT images. Irregular breathing will significantly increase the motion artifact of 4DCT

Images