Patent ID: 8049176

Claim:
A system for monitoring and imaging low energy radiation generated in the course of radiation therapy comprising: A radiation treatment apparatus for the application of radiation therapy to a patient wherein said radiation treatment apparatus utilizes a dynamically moving or scanning radiotherapy beam; and a system for detecting secondary low energy radiation emitted from an area of treatment comprising: I) a gantry for location about a patient being subjected to radiation therapy; and II) rotatably and radially movably mounted on the gantry at least two angularly disposed detector modules each comprising: a) a radiation shielding housing; b) a low energy pinhole collimator in the radiation shielding housing; c) a low energy radiation sensitive layer in the radiation shielding housing behind the pinhole collimator; d) a photodetector optically connected to the radiation sensitive layer that registers radiation detection events; e) electronics that receive the registered radiation detection events from the photodetector and convert the radiation detection events into dynamic images of a radiation beam entering the housing via the pinhole collimator; and f) electronics for converting the dynamic images into spatially resolved images of the radiation detection events on a real time basis.