Speaker
Hidenori Matsuda
(Waseda University)
Description
We developed a front-end ASIC for future PET scanners with time-of-flight (TOF) capability to be coupled with Multi Pixel Photon Counter (MPPC) arrays. The ASIC is designed based on the open-IP project proposed by JAXA and realized in TSMC 0.35 $\mu$m CMOS technology. The circuit comprises 32-channel, low impedance current conveyers to effectively acquire fast MPPC signals. For precise measurement of coincidence timing of 511 keV gamma-rays, the leading-edge method was used to discriminate the signal, and compared with a conventional zero-crossing measurement. We first tested a time response of the ASIC by illuminating a single MPPC device of 3 × 3 mm$^{2}$ in size with a Pico-second Light Pulsar with light emission peak of 655 nm and pulse duration of 54 ps (FWHM). We obtained 67 ps (FWHM) and 98 ps (FWHM) for the time jitter and walk measurements, respectively. Excellent energy resolution of 10.5 % (FWHM) was also obtained for 511 keV gamma-rays, when the MPPC and ASIC were coupled with a LYSO pixel scintillator of 3 × 3 ×10 mm$^{3}$ in size. We will also report on the TOF measurements using back-to-back 511 keV signals, and suggest that the ASIC can be a promising device for future TOF-PET scanners based on the MPPC array.
Author
Hidenori Matsuda
(Waseda University)
Co-authors
Goro Sato
(JAXA)
Hirokazu Ikeda
(JAXA)
Jun Kataoka
(Waseda University)
Kazuhisa Yamamura
(Hamamatsu Photonics K.K.)
Kenichi Sato
(Hamamatsu Photonics K.K.)
Nobuyuki Kawabata
(Hamamatsu Photonics K.K.)
Shigeyuki Nakamura
(Hamamatsu Photonics K.K.)
Takamasa Miura
(Waseda University)
Takeshi Nakamori
(Waseda University)
Takuya Kato
(Waseda University)
Yoshitaka Ishikawa
(Hamamatsu Photonics K.K.)
