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To obtain three kinds of tomograms at three different X-ray energy ranges simultaneously, we have constructed a triple-energy (TE) X-ray photon counter with a cadmium telluride (CdTe) detector and three sets of comparators and microcomputers (MCs). X-ray photons are detected using the CdTe detector, and the event pulses produced using amplifiers are sent to three comparators simultaneously to regulate...
To obtain two kinds of tomograms at two different X-ray energy ranges simultaneously, we have constructed a dual-energy X-ray photon counter with a high-count-rate detector system, three comparators, two microcomputers, and two frequency-voltage converters. The detector system consists of a cerium-doped yttrium aluminum perovskite [YAP(Ce)], a photomultiplier tube, an inverse amplifier, and a pulse-width...
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