| 摘要 |
<p>A gamma camera scintillator structure, suitable for detecting high energy gamma photons which, in a single scintillator camera, would require a comparatively thick scintillator crystal, so resulting in unacceptable dispersion of light photons, comprises a collimator array 10 of a high Z material with elongated, parallel wall channels with the scintillator material 30 being disposed in one end of the channels so as to form an integrated collimator/scintillator structure. The collimator channel walls are preferably coated, 34, with light reflective material and further light reflective surfaces 32, being translucent to gamma photons, may be provided in each channel. The scintillators may be single crystals or preferably comprise a phosphor dispersed in a thermosetting translucent matrix as disclosed in GB 2012800A. The light detectors of the assembled camera may be photomultiplier tubes 13, charge coupled devices or charge injection devices. <IMAGE></p> |
