| 摘要 |
A radiation detector includes a housing (12), an elongated, rectangular crystal (42) having four longitudinally extending corners, and a photomultiplier tube (44) both supported in the housing, with a light pipe (46) located axially between respective facing ends (54,50) of the photomultiplier tube and the crystal; and a plurality of elongated rails (68) extending along respective ones of the longitudinally extending corners of the rectangular crystal, establishing an air gap between the crystal and the housing. <IMAGE> |
