
Proceedings Paper
Spectral x-ray computed tomography scanner using a cadmium telluride detectorFormat | Member Price | Non-Member Price |
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Paper Abstract
To obtain four tomograms with four different photon energy ranges simultaneously, we have developed a quad-energy Xray
photon counter with a cadmium telluride (CdTe) detector and four sets of comparators and frequency-voltage
converters (FVCs). X-ray photons are detected using the CdTe detector, and the event pulses from a shaping amplifier are
sent to four comparators simultaneously to regulate four threshold energies of 20, 35, 50 and 65 keV. Using this counter,
the energy ranges are 20-100, 35-100, 50-100 and 65-100 keV; the maximum energy corresponds to the tube voltage. Xray
photons in the four ranges are counted using the comparators, and the logical pulses from the comparators are input
to the FVCs. The outputs from the four FVCs are input to a personal computer through an analog-digital converter (ADC)
to carry out quad-energy imaging. To observe contrast variations with changes in the threshold energy, we performed
spectral computed tomography utilizing the quad-energy photon counter at a tube voltage of 100 kV and a current of 8.0
μA. In the spectral CT, four tomograms were obtained simultaneously with four energy ranges. The image contrast varied
with changes in the threshold energy, and the exposure time for tomography was 9.8 min.
Paper Details
Date Published: 3 October 2016
PDF: 6 pages
Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 99690L (3 October 2016); doi: 10.1117/12.2237526
Published in SPIE Proceedings Vol. 9969:
Radiation Detectors: Systems and Applications XVII
Gary P. Grim; H. Bradford Barber; Lars R. Furenlid, Editor(s)
PDF: 6 pages
Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 99690L (3 October 2016); doi: 10.1117/12.2237526
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. Ohashi Medical Ctr. (Japan)
Yasuyuki Oda, 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)
Manabu Watanabe, Toho Univ. Ohashi Medical Ctr. (Japan)
Shinya Kusachi, 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. 9969:
Radiation Detectors: Systems and Applications XVII
Gary P. Grim; H. Bradford Barber; Lars R. Furenlid, Editor(s)
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