Coincidence counting method of γray and nuclear medicine diagnostic apparatus

A γ-ray signal processing section ′ determines a detection time of a γ ray based on a α-ray detection signal outputted from a semiconductor radiation detector for detecting the γ ray, and determines the energy of the γ ray. Then, a time correction circuit obtains, based on the energy of the γ ray, a...

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Main Authors Yanagita, Norihito, Ueno, Yuuichirou, Amemiya, Kensuke, Kitaguchi, Hiroshi, Tsuchiya, Katsutoshi, Kojima, Shinichi, Yokoi, Kazuma, Ishitsu, Takafumi
Format Patent
LanguageEnglish
Published 25.09.2007
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Abstract A γ-ray signal processing section ′ determines a detection time of a γ ray based on a α-ray detection signal outputted from a semiconductor radiation detector for detecting the γ ray, and determines the energy of the γ ray. Then, a time correction circuit obtains, based on the energy of the γ ray, a detection value of the detection time that corresponds to the energy of the γ ray from a time correction table indicating the relationship between the energy of the γ ray and the correction value of the detection time of the γ ray, and corrects the detection time according to the obtained correction value of the detection time. Coincidence counting is performed on the γ ray in a coincidence counting circuit based on the corrected detection time.
AbstractList A γ-ray signal processing section ′ determines a detection time of a γ ray based on a α-ray detection signal outputted from a semiconductor radiation detector for detecting the γ ray, and determines the energy of the γ ray. Then, a time correction circuit obtains, based on the energy of the γ ray, a detection value of the detection time that corresponds to the energy of the γ ray from a time correction table indicating the relationship between the energy of the γ ray and the correction value of the detection time of the γ ray, and corrects the detection time according to the obtained correction value of the detection time. Coincidence counting is performed on the γ ray in a coincidence counting circuit based on the corrected detection time.
Author Kojima, Shinichi
Ishitsu, Takafumi
Yanagita, Norihito
Yokoi, Kazuma
Ueno, Yuuichirou
Kitaguchi, Hiroshi
Tsuchiya, Katsutoshi
Amemiya, Kensuke
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References DiFilippo et al. (5793045) 19980800
DiFilippo et al. (5969358) 19991000
Yamashita et al. (5023894) 19910600
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(11-052059) 19990200
Heuscher et al. (7058440) 20060600
(11-72566) 19990300
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