| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation detector for diagnosing nuclear medicine image improved in position resolution and energy resolution, a device provided with the detector, especially a positron emission tomography (PET) device, and a Compton camera provided with the detector. SOLUTION: By using a radiation detector calculating a position where introduced radiation causes ionization of the detector constituting material and generates carrier as three-dimensional information in the detector, spacial position resolution is drastically improved. For the detector, an HPGe detector is enumerated. The HPGe detector has a characteristic of high energy resolution so that it can distinguish primary photons from scattered photons, and can improve measurement accuracy and sensitivity. It can be used also as the Compton camera. COPYRIGHT: (C)2005,JPO&NCIPI
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