Mcps-range photon-counting x-ray computed tomography system

Eiichi Sato; Yasuyuki Oda; Abulajiang Abudurexiti; Osahiko Hagiwara; Toshiyuki Enomoto; Shigeaki Sugimura; Haruyuki Endo; Shigehiro Sato; Akira Ogawa; Jun Onagawa

doi:10.1117/12.893219

15 September 2011 Mcps-range photon-counting x-ray computed tomography system

Eiichi Sato, Yasuyuki Oda, Abulajiang Abudurexiti, Osahiko Hagiwara, Toshiyuki Enomoto, Shigeaki Sugimura, Haruyuki Endo, Shigehiro Sato, Akira Ogawa, Jun Onagawa

Author Affiliations +

Proceedings Volume 8143, Medical Applications of Radiation Detectors; 81430K (2011) https://doi.org/10.1117/12.893219
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

10 Mcps photon counting was carried out using a detector consisting of a 2.0 mm-thick ZnO (zinc oxide) single-crystal scintillator and an MPPC (multipixel photon counter) module in an X-ray computed tomography (CT) system. The maximum count rate was 10 Mcps (mega counts per second) at a tube voltage of 70 kV and a tube current of 2.0 mA. Next, a photon-counting X-ray CT system consists of an X-ray generator, a turntable, a scan stage, a two-stage controller, the ZnO-MPPC detector, a counter card (CC), and a personal computer (PC). Tomography is accomplished by repeated linear scans and rotations of an object, and projection curves of the object are obtained by the linear scan with a scan velocity of 25 mm/s. The pulses of the event signal from the module are counted by the CC in conjunction with the PC. The exposure time for obtaining a tomogram was 600 s at a scan step of 0.5 mm and a rotation step of 1.0°, and photon-counting CT was accomplished using iodine-based contrast media.

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Eiichi Sato, Yasuyuki Oda, Abulajiang Abudurexiti, Osahiko Hagiwara, Toshiyuki Enomoto, Shigeaki Sugimura, Haruyuki Endo, Shigehiro Sato, Akira Ogawa, and Jun Onagawa "Mcps-range photon-counting x-ray computed tomography system", Proc. SPIE 8143, Medical Applications of Radiation Detectors, 81430K (15 September 2011); https://doi.org/10.1117/12.893219

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KEYWORDS

X-rays

Sensors

X-ray computed tomography

X-ray detectors

Zinc oxide

Microchannel plates

Photon counting

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