PHOTON RADIATION THERAPY MONITORING APPARATUS

摘要

Device (1 ) for monitoring photon radiation therapy comprises a radiation detector (6) plus a multi-hole collimator (7), readout electronics (16) and a data acquisition system (5) able to process detected events (ry) and beam (2) positions (rb), supported by a fixed or telescopic arm attached to the LINAC support structure, or by an independent support. Between the LINAC head (9) and the said collimator (7) a radiation-absorber material (17) can be placed. Also, next to said device (1 ), between it and the LINAC head a shielding material (18) can be used. The multi-hole collimator (7) allows for photons escaping the target/patient (4) on a couch (3), to be collected only if they are emitted approximately perpendicular to the central axis of the beam (2) direction.