Systems, methods, and devices for radiation beam alignment and radiation beam measurements using electronic portal imaging devices

Abstract

Systems and methods for using electronic portal imaging devices (EPIDs) as absolute radiation beam measuring devices and as radiation beam alignment devices without implementation of elaborate and complex calibration procedures.

Description

technical field [0001] The present disclosure relates generally to radiation therapy and, more specifically, to systems for implementing an electronic portal imaging device (EPID) as a radiation beam measurement device and as a radiation beam alignment device without the need for elaborate calibration procedures and methods. Background technique [0002] In radiosurgery or radiation therapy (collectively called radiation therapy), very intense and precisely collimated doses of radiation are delivered to a targeted area (volume of tumor tissue) in the patient in order to treat or destroy tumors or other lesions, such as are for example blood clots, cysts, aneurysms or inflammatory masses. The goal of radiation therapy is to deliver precisely the prescribed radiation dose to the tumor / lesion while sparing surrounding healthy tissue. Therefore, the geometrical accuracy of the positioning of the patient relative to the treatment beam, as well as the location and amount of dose...

AI Technical Summary

Problems solved by technology

However, EPID is not a dosimeter because the interaction of the photons that lead to the EPID image is different from the interaction in water or tissue that leads to the radiation dose

Therefore, the raw EPID image is not a dosimetry image, and the EPID response deviates from what would be expected based on water-based dosimetry

Images