TY - JOUR
T1 - Development of ultra-fast ASIC for future PET scanners using TOF-capable MPPC detectors
AU - Matsuda, H.
AU - Kataoka, J.
AU - Ikeda, H.
AU - Kato, T.
AU - Anbe, T.
AU - Nakamura, S.
AU - Ishikawa, Y.
AU - Sato, K.
AU - Yamamura, K.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2013/1/21
Y1 - 2013/1/21
N2 - We have developed a front-end ASIC (MPPC32) intended for future PET scanners that offers time-of-flight (TOF) capability in conjunction with a multi-pixel photon counter (MPPC) array. The ASIC design is based on the open-IP project proposed by JAXA and was realized in TSMC 0.35-μm CMOS technology. The circuit comprises 32-channel, low impedance CMOS current conveyors (CCs) to effectively acquire fast MPPC signals. In order to precisely measure the coincidence timing of 511 keV gamma rays, the leading-edge method was employed instead of conventional zero-crossing measurement to discriminate signals. As a result, we obtained time jitter and walk measurement of 67 ps (FWHM) and 98 ps (within 511 keV±20%), respectively. Moreover, excellent energy resolutions of 9.8% (662 keV; FWHM) and 10.5% (511 keV; FWHM) were obtained by utilizing a 3×3 mm2 MPPC (of 50μm pitch) coupled with a Ce-doped LYSO (Ce:LYSO) crystal 3×3×10 mm3 in size. We finally report on the TOF measurements, and demonstrate that the MPPC32 developed here can be a promising device for future TOF-PET scanners using the MPPC array.
AB - We have developed a front-end ASIC (MPPC32) intended for future PET scanners that offers time-of-flight (TOF) capability in conjunction with a multi-pixel photon counter (MPPC) array. The ASIC design is based on the open-IP project proposed by JAXA and was realized in TSMC 0.35-μm CMOS technology. The circuit comprises 32-channel, low impedance CMOS current conveyors (CCs) to effectively acquire fast MPPC signals. In order to precisely measure the coincidence timing of 511 keV gamma rays, the leading-edge method was employed instead of conventional zero-crossing measurement to discriminate signals. As a result, we obtained time jitter and walk measurement of 67 ps (FWHM) and 98 ps (within 511 keV±20%), respectively. Moreover, excellent energy resolutions of 9.8% (662 keV; FWHM) and 10.5% (511 keV; FWHM) were obtained by utilizing a 3×3 mm2 MPPC (of 50μm pitch) coupled with a Ce-doped LYSO (Ce:LYSO) crystal 3×3×10 mm3 in size. We finally report on the TOF measurements, and demonstrate that the MPPC32 developed here can be a promising device for future TOF-PET scanners using the MPPC array.
KW - ASIC
KW - Gamma-rays
KW - Multi-pixel photon counter
KW - Open-IP
KW - Positron Emission Tomography
UR - http://www.scopus.com/inward/record.url?scp=84870429342&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84870429342&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2012.05.040
DO - 10.1016/j.nima.2012.05.040
M3 - Article
AN - SCOPUS:84870429342
SN - 0168-9002
VL - 699
SP - 211
EP - 215
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -