Radiotherapy multispectral imaging device

Abstract

The invention discloses a radiotherapy multispectral imaging device, which comprises a detector which is connected to an X-ray transmitting device, wherein the detector comprises four groups of CCDs which are encapsulated in a shell and are used for acquiring Cerenkov photons; filter sheets, which have different filtering wavelengths, are additionally arranged on each group of CCD; the detector isencapsulated at the front side of a KV-grade X-ray bulb tube and is orthogonal with an MV-grade headpiece; the MV-grade headpiece of the X-ray transmitting device can implement rotary irradiation byat least 180 degrees; and the CCDs, along with the rotation of the MV-grade headpiece, can acquire the Cerenkov photons for imaging. The detector can acquire signals, without influence from an accelerator stand; moreover, a detection angle keeps a right angle with an MV-grade therapy ray angle, and the detection angle cannot change along with change in the therapy angle; and the various filter sheets are adopted by the multiple groups of CCDs, and compared with single spectral imaging, the multispectral imaging is more accurate.

Description

technical field [0001] The invention belongs to the technical field of radiotherapy equipment, and relates to a multispectral imaging device for radiotherapy. Background technique [0002] At present, radiation therapy has become one of the standard treatment methods after breast-conserving surgery for breast tumors. In order to reduce the position error of radiotherapy, image-guided radiotherapy technology has developed rapidly. [0003] In 2006, Varian Corporation of the United States and Elekta Corporation of Sweden developed a radiological imaging system, which installed KV-X-ray tubes and a large-size amorphous silicon flat panel detector on two robotic arms, and could simultaneously collect KV images and MV video. The real-time breathing tracking system developed by Ankerui Company in the United States is composed of 2 cameras and amorphous silicon detectors distributed indoors, which are fused with the digitally reconstructed image DRR in the form of 2D or 3D, so as...

AI Technical Summary

Problems solved by technology

However, the above schemes all use X-ray radiation, causing patients to receive unnecessary doses of radiation, and it is impossible to verify the accuracy of the dose received by the tumor

[0004] In 2014, Varian Corporation of the United States and Elekta Corporation of Sweden developed a radiological imaging system whose imaging speed is on the order of minutes, while the breathing cycle of patients is on the order of milliseconds, which cannot achieve real-time imaging of breast tumors

However, due to the relatively short launch time of C-Dose, some outstanding problems have been exposed in the application process

In the process of breast cancer treatment, the detector is placed in a fixed position around, and the detection range is limited. Especially in the multi-angle treatment process, the treatment angles are many and change quickly, and the detector is affected by the accelerator rack, so it cannot collect signals; Similar problems exist in angle-modulated intensity-modulated therapy, and the above factors limit the application of CLI in complex tumor radiation therapy techniques

Images