Abstract

Interest in computer assisted tomography has seen in recent years an increase in applications on a wider basis extending beyond medical investigations. Technological developments have made available a larger selection of detectors which may be employed in imaging studies. Limited resources in a university research group and the fact that some of the types of detectors are still at the research stage of production, e.g. cadmium telluride, demanded the investigation of parameters by which detectors may be selected for specific applications. Experiments using a scanning rig were carried out to measure efficiency, energy resolution, scatter, spatial resolution and detection limit for sodium iodide, bismuth germanate, caesium fluoride, cadmium telluride and intrinsic germanium detectors.

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