Importance

Loading Importance Indicators...

Abstract

A gamma camera includes a plurality of detectors (32, 34) for detecting emission radiation emitted from within a subject and transmission radiation which has traversed a subject to be imaged, the subject attenuating the radiation. Each detector generates position and energy data. At least one transmission radiation source (54, 54') transmits transmission radiation through an examination region (36) to a first segment (74, 74') of the opposite detector. In one embodiment, segment selector circuitry (88) connected with the detectors selectively disables a portion of each detector head during collection of emission data, transmission data, or both. In another embodiment, transmission radiation is received by the first segment (74, 74') simultaneously with emission radiation being received by a second segment (72, 72') of each detector. The first segment is uncollimated or collimated for the transmission radiation source. In SPECT imaging, the second segment carries a collimator for defining trajectories of received emission radiation. A first electronic storage medium (90) connected with the segment selector circuitry stores transmission data and a second electronic storage medium (86) connected with the segment selector circuitry stores emission data. A first reconstruction processor (92) connected with the first electronic storage medium generates a transmission image representation (94). A second reconstruction processor (100, 101) connected with the second electronic storage medium generates an emission image representation (102, 103).

Loading the Abstract Image...

First Claim