DUAL MODE GAMMA CAMERA SYSTEM

摘要

A nuclear camera system comprises a pair of detectors (10, 11) oriented 180 degrees apart about an axis of rotation (Z) for detecting radiation emitted from an object (15), a pair of single-photon radiation point sources (30A, 31A) for transmitting radiation through the object, each to a different detector, and a gantry (14) supporting the detectors and the radiation sources. The angular positions of the radiation sources about the axis of rotation remain fixed relative to the angular positions of the detectors. The camera system further includes a processing system (22) coupled to control the detectors and the radiation sources and to selectably configure the detectors for either coincidence or single-photon emission imaging. The processing system controls the detectors to acquire coincidence emission data of the object and controls the single-photon point sources to acquire transmission data of the object. The processing system corrects the acquired coincidence emission data for attenuation using the transmission data.