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Proceedings Paper

Dual-energy X-ray photon counting using an LSO-MPPC spectrometer and an energy-selecting device
Author(s): Eiichi Sato; Yasuyuki Oda; Satoshi Yamaguchi; Osahiko Hagiwara; Hiroshi Matsukiyo; Manabu Watanabe; Shinya Kusachi
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Paper Abstract

Dual-energy photon counting was performed using an energy-selecting device (ESD) and a detector, consisting of a Lu2(SiO4)O [LSO)] crystal and a multipixel photon counter (MPPC). The ESD is used to determine a low-energychannel range for CT and consists of two comparators and a microcomputer (MC). The two threshold channels in proportion to energies are determined using low and high-energy comparators, respectively. The MC in the ESD produces a single logical pulse when only a logical pulse from the low-energy comparator is input to the MC. To determine the high-energy-channel range for CT, logical pulses from the high-energy comparator are input to the MC outside the ESD. Logical pulses from the two MCs are input to frequency-voltage converters (FVCs) to convert count rates into voltages. The output voltages from the two FVCs are sent to a personal computer through an analog-digital converter to reconstruct tomograms. Dual-energy computed tomography was accomplished at a tube voltage of 70 kV and a maximum count rate of 14.3 kilocounts per second, and two-different-energy tomograms were obtained simultaneously.

Paper Details

Date Published: 27 August 2015
PDF: 7 pages
Proc. SPIE 9594, Medical Applications of Radiation Detectors V, 95940F (27 August 2015); doi: 10.1117/12.2188967
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Yasuyuki Oda, Iwate Medical Univ. (Japan)
Satoshi Yamaguchi, Iwate Medical Univ. (Japan)
Osahiko Hagiwara, Toho Univ. (Japan)
Hiroshi Matsukiyo, Toho Univ. (Japan)
Manabu Watanabe, Toho Univ. (Japan)
Shinya Kusachi, Toho Univ. (Japan)

Published in SPIE Proceedings Vol. 9594:
Medical Applications of Radiation Detectors V
H. Bradford Barber; Lars R. Furenlid; Hans N. Roehrig, Editor(s)

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