发明名称 |
DATA ACQUISITION DEVICE, PAIR ANNIHILATION GAMMA RAY DETECTOR, AND PAIR ANNIHILATION GAMMA RAY DETECTION METHOD |
摘要 |
An apparatus and method for channel count reduction in solid-state-based positron emission tomography that multiplexes read-outs from photo-detectors using a sum delay circuit, including a sum channel and a delay-sum channel. The sum channel sums signals from sensors in an array and is digitized to extract the timing and energy information. A delay-sum channel includes a discrete delay line (305) that introduces a known delay after each sensor, creating a time signature for each sensor (301), followed by a summing circuit (303) that adds delayed signals. The delay-sum channel is digitized using a high speed counter (509) to extract location information. Start and Stop signals for the counter are derived when the sum channel output and the delay-sum channel output cross a pulse ID threshold, respectively. The pulse ID threshold is chosen to minimize the Compton Scatter and not clip photo-peak events. |
申请公布号 |
EP2876464(A1) |
申请公布日期 |
2015.05.27 |
申请号 |
EP20130820387 |
申请日期 |
2013.07.18 |
申请人 |
KABUSHIKI KAISHA TOSHIBA, INC.;TOSHIBA MEDICAL SYSTEMS CORPORATION |
发明人 |
GAGNON, DANIEL;JUNNARKAR, SACHIN S. |
分类号 |
G01T1/161;G01T1/24 |
主分类号 |
G01T1/161 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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