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Proceedings Paper

Triple-energy high-count-rate x-ray computed tomography scanner using a cooled cadmium-telluride detector
Author(s): Hodaka Moriyama; Eiichi Sato; Yasuyuki Oda; Yuichi Sato; Sohei Yoshida; Satoshi Yamaguchi; Osahiko Hagiwara; Hiroshi Matsukiyo; Toshiyuki Enomoto; Manabu Watanabe; Shinya Kusachi
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Paper Abstract

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 cooled cadmium telluride (CdTe) detector and three sets of comparators and microcomputers. X-ray photons are detected using the CdTe detector, and the event pulses produced using amplifiers are sent to three comparators simultaneously to regulate three threshold energies of 15, 33 and 50 keV. Using this counter, the energy ranges are 15-33, 33-50 and 50-100 keV; the maximum energy corresponds to the tube voltage. We performed TE computed tomography (TE-CT) at a tube voltage of 100 kV. Using four lead pinholes, three tomograms were obtained simultaneously. Iodine-K-edge CT was carried out utilizing an energy range of 33-50 keV. At a tube voltage of 100 kV and a current of 0.11 mA, the count rate was 21 kilocounts per second (kcps).

Paper Details

Date Published: 11 September 2018
PDF: 7 pages
Proc. SPIE 10763, Radiation Detectors in Medicine, Industry, and National Security XIX, 107630H (11 September 2018); doi: 10.1117/12.2320172
Show Author Affiliations
Hodaka Moriyama, Toho Univ. Ohashi Medical Ctr. (Japan)
Eiichi Sato, Iwate Medical Univ. (Japan)
Yasuyuki Oda, Iwate Medical Univ. (Japan)
Yuichi Sato, Iwate Medical Univ. (Japan)
Sohei Yoshida, Iwate Medical Univ. (Japan)
Satoshi Yamaguchi, Iwate Medical Univ. (Japan)
Osahiko Hagiwara, Toho Univ. Ohashi Medical Ctr. (Japan)
Hiroshi Matsukiyo, Toho Univ. Ohashi Medical Ctr. (Japan)
Toshiyuki Enomoto, Toho Univ. Ohashi Medical Ctr. (Japan)
Manabu Watanabe, Toho Univ. Ohashi Medical Ctr. (Japan)
Shinya Kusachi, Toho Univ. Ohashi Medical Ctr. (Japan)


Published in SPIE Proceedings Vol. 10763:
Radiation Detectors in Medicine, Industry, and National Security XIX
Gary P. Grim; Lars R. Furenlid; H. Bradford Barber; Jeffrey A. Koch, Editor(s)

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