title: 15Mcps photon-counting X-ray computed tomography system using a ZnO-MPPC detector and its application to gadolinium imaging.
abstract: 15Mcps photon-counting X-ray computed tomography (CT) system is a first-generation type and consists of an X-ray generator, a turntable, a translation stage, a two-stage controller, a detector consisting of a 2mm-thick zinc-oxide (ZnO) single-crystal scintillator and an MPPC (multipixel photon counter) module, a counter card (CC), and a personal computer (PC). High-speed photon counting was carried out using the detector in the X-ray CT system. The maximum count rate was 15Mcps (mega counts per second) at a tube voltage of 100kV and a tube current of 1.95mA. Tomography is accomplished by repeated translations and rotations of an object, and projection curves of the object are obtained by the translation. The pulses of the event signal from the module are counted by the CC in conjunction with the PC. The minimum exposure time for obtaining a tomogram was 15min, and photon-counting CT was accomplished using gadolinium-based contrast media.
authors.affiliation: Department of Physics, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan. dresato@iwate-med.ac.jp
authors.forename: Eiichi
authors.initials: E
authors.lastname: Sato
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Sugimura
authors.forename: Haruyuki
authors.initials: H
authors.lastname: Endo
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Oda
authors.forename: Abulajiang
authors.initials: A
authors.lastname: Abudurexiti
authors.forename: Osahiko
authors.initials: O
authors.lastname: Hagiwara
authors.forename: Akihiro
authors.initials: A
authors.lastname: Osawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsukiyo
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Enomoto
authors.forename: Manabu
authors.initials: M
authors.lastname: Watanabe
authors.forename: Shinya
authors.initials: S
authors.lastname: Kusachi
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Sato
authors.forename: Akira
authors.initials: A
authors.lastname: Ogawa
authors.forename: Jun
authors.initials: J
authors.lastname: Onagawa
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005682:Gadolinium; D017785:Photons; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*; D015034:Zinc Oxide / Q000528:radiation effects*
chemical_list: D005682:Gadolinium; D015034:Zinc Oxide