Author/Authors :
Koizumi، نويسنده , , M. and Kataoka، نويسنده , , J. and Tanaka، نويسنده , , S. and Ishibashi، نويسنده , , H. and Kawai، نويسنده , , N. and Ikeda، نويسنده , , H. and Ishikawa، نويسنده , , Y. and Kawabata، نويسنده , , N. and Matsunaga، نويسنده , , Y. and Shimizu، نويسنده , , K. and Kubo، نويسنده , , H.، نويسنده ,
Abstract :
We report on the development of a front-end ASIC for high spatial resolution PET detectors with time-of-flight capability based on LYSO scintillator arrays coupled with position-sensitive avalanche photodiode (APD) arrays. The ASIC is designed based on the open-IP LSI project led by JAXA and realized in TSMC 0.35 - μ m CMOS technology. It consists of an 8-channel charge-sensitive amplifier, band-pass filters, differentiators, pulse-height and timing discriminators, and two-channel time-to-amplitude converters. As a result, energy resolution of 9.7% (FWHM) is obtained at 511 keV, with a time resolution below 970 ps ( σ ) . We will also report on the current status of developing a second-version ASIC designed to have 32-channel analog circuits with improved time resolution.
Keywords :
Avalanche photodiode , ASIC , Open-IP , Positron emission tomography (PET) , ? -Rays
