TY - JOUR
T1 - Energy-discriminating gadolinium K-edge X-ray computed tomography system
AU - Matsukiyo, Hiroshi
AU - Watanabe, Manabu
AU - Sato, Eiichi
AU - Osawa, Akihiro
AU - Enomoto, Toshiyuki
AU - Nagao, Jiro
AU - Abderyim, Purkhet
AU - AIzawa, Katsuo
AU - Hitomi, Keitaro
AU - Tanaka, Etsuro
AU - Mori, Hidezo
AU - Kawai, Toshiaki
AU - Ogawa, Akira
AU - Takahashi, Kiyomi
AU - Sato, Shigehiro
AU - Onagawa, Jun
PY - 2010/2/1
Y1 - 2010/2/1
N2 - An energy-discriminating K-edge X-ray computed tomography (CT) system is useful for increasing the contrast resolution of a target region utilizing contrast media and for reducing the absorbed dose for patients. The CT system is of the first-generation type of detector using cadmium telluride (CdTe). CT is performed by repeated translations and rotations of an object. Penetrating X-ray photons from the object are detected by a CdTe detector, and event signals of X-ray photons are produced using charge-sensitive and shaping amplifiers. Both photon energy and energy width are selected out using a multichannel analyzer, and the number of photons is counted by a countercard. To perform energy discrimination, a low-dose-rate X-ray generator for photon counting was developed. Its maximum tube voltage and minimum tube current were 110kV and 1mA, respectively. In energy-discriminating CT, the tube voltage and tube current were 100kV and 20mA, respectively, and the X-ray intensity was 2.98μGy/s at a distance of 1.0 m from the source and a tube voltage of 100 kV. The demonstration of enhanced gadolinium K-edge X-ray CT was carried out by selecting photons with energies just beyond the gadolinium K-edge energy of 50.3 keV.
AB - An energy-discriminating K-edge X-ray computed tomography (CT) system is useful for increasing the contrast resolution of a target region utilizing contrast media and for reducing the absorbed dose for patients. The CT system is of the first-generation type of detector using cadmium telluride (CdTe). CT is performed by repeated translations and rotations of an object. Penetrating X-ray photons from the object are detected by a CdTe detector, and event signals of X-ray photons are produced using charge-sensitive and shaping amplifiers. Both photon energy and energy width are selected out using a multichannel analyzer, and the number of photons is counted by a countercard. To perform energy discrimination, a low-dose-rate X-ray generator for photon counting was developed. Its maximum tube voltage and minimum tube current were 110kV and 1mA, respectively. In energy-discriminating CT, the tube voltage and tube current were 100kV and 20mA, respectively, and the X-ray intensity was 2.98μGy/s at a distance of 1.0 m from the source and a tube voltage of 100 kV. The demonstration of enhanced gadolinium K-edge X-ray CT was carried out by selecting photons with energies just beyond the gadolinium K-edge energy of 50.3 keV.
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U2 - 10.1143/JJAP.49.027001
DO - 10.1143/JJAP.49.027001
M3 - Article
AN - SCOPUS:77950828376
VL - 49
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2 Part 1
M1 - 027001
ER -