High-speed tripe-energy x-ray photon counter using a room-temperature cadmium-telluride detector and its application to high-spatial-resolution low-dose computed tomography

Manabu Watanabe; Eiichi Sato; Yasuyuki Oda; Yuichi Sato; Satoshi Yamaguchi; Hodaka Moriyama; Osahiko Hagiwara; Hiroshi Matsukiyo; Toshiyuki Enomoto; Shinya Kusachi

doi:10.1117/12.2524630

28 January 2019 High-speed tripe-energy x-ray photon counter using a room-temperature cadmium-telluride detector and its application to high-spatial-resolution low-dose computed tomography

Manabu Watanabe, Eiichi Sato, Yasuyuki Oda, Yuichi Sato, Satoshi Yamaguchi, Hodaka Moriyama, Osahiko Hagiwara, Hiroshi Matsukiyo, Toshiyuki Enomoto, Shinya Kusachi

Author Affiliations +

Proceedings Volume 11051, 32nd International Congress on High-Speed Imaging and Photonics; 110510H (2019) https://doi.org/10.1117/12.2524630
Event: International Conference on High-Speed Imaging and Photonics 2018, 2018, Enschede, The Netherlands

Abstract

We have constructed a triple-energy (TE) X-ray photon counter with a room-temperature cadmium telluride (CdTe) detector and three sets of comparators and microcomputers to obtain three kinds of tomograms at three different X-ray energy ranges simultaneously. X-ray photons are detected using the CdTe detector, and the event pulses produced using amplifier module 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. The photon-energy resolution was 3.5% at 59.5 keV. We performed TE computed tomography (TE-CT) at a tube voltage of 100 kV. Using four lead pinholes, three tomograms were obtained simultaneously. Gadolinium-K-edge CT was carried out utilizing an energy range of 50-100 keV. At a tube voltage of 100 kV and a current of 1.60 mA, the count rate was 59 kilocounts per second (kcps).

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Manabu Watanabe, Eiichi Sato, Yasuyuki Oda, Yuichi Sato, Satoshi Yamaguchi, Hodaka Moriyama, Osahiko Hagiwara, Hiroshi Matsukiyo, Toshiyuki Enomoto, and Shinya Kusachi "High-speed tripe-energy x-ray photon counter using a room-temperature cadmium-telluride detector and its application to high-spatial-resolution low-dose computed tomography", Proc. SPIE 11051, 32nd International Congress on High-Speed Imaging and Photonics, 110510H (28 January 2019); https://doi.org/10.1117/12.2524630

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KEYWORDS

X-rays

Sensors

X-ray detectors

Photon counting

X-ray computed tomography

Gadolinium

Scanners

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