TY - JOUR
T1 - Development of large-area, reverse-type APD-arrays for high-resolution medical imaging
AU - Kataoka, J.
AU - Koizumi, M.
AU - Tanaka, S.
AU - Ishibashi, H.
AU - Nakamori, T.
AU - Kawai, N.
AU - Ikeda, H.
AU - Ishikawa, Y.
AU - Kawabata, N.
AU - Matsunaga, Y.
AU - Kishimoto, S.
AU - Kubo, H.
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Avalanche photodiodes (APD) offer advantages in terms of weak scintillation detection, fast time response, and magnetic field insensitivity. We have developed new types of large-area, reverse-type APD-arrays specifically designed for high-resolution positron emission tomography (PET). Each device has a monolithic 16 × 16 (or 8 × 8) pixel structure with an active area of 1.0 (or 4.0, 0.25) mm2 for each pixel. An excellent gain uniformity (≤ 10 %) and low dark noise (≤ 0.3 nA) have been achieved, measured at room temperature. Energy resolution of 7.2 % (FWHM) was obtained for the direct detection of 5.9 keV X-rays, while 10.2 % (FWHM) was obtained for 662 keV gamma-rays when coupled with a LYSO scintillator matrix. An excellent time resolution of 102 ps (FWHM) was obtained for a monolithic, 3 mm φ APD pixel. These results suggest that APD-arrays could be a promising device for future applications in nuclear medicine.
AB - Avalanche photodiodes (APD) offer advantages in terms of weak scintillation detection, fast time response, and magnetic field insensitivity. We have developed new types of large-area, reverse-type APD-arrays specifically designed for high-resolution positron emission tomography (PET). Each device has a monolithic 16 × 16 (or 8 × 8) pixel structure with an active area of 1.0 (or 4.0, 0.25) mm2 for each pixel. An excellent gain uniformity (≤ 10 %) and low dark noise (≤ 0.3 nA) have been achieved, measured at room temperature. Energy resolution of 7.2 % (FWHM) was obtained for the direct detection of 5.9 keV X-rays, while 10.2 % (FWHM) was obtained for 662 keV gamma-rays when coupled with a LYSO scintillator matrix. An excellent time resolution of 102 ps (FWHM) was obtained for a monolithic, 3 mm φ APD pixel. These results suggest that APD-arrays could be a promising device for future applications in nuclear medicine.
KW - Avalanche photodiode
KW - Scintillation detection
KW - γ-rays
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U2 - 10.1016/j.nima.2009.01.083
DO - 10.1016/j.nima.2009.01.083
M3 - Article
AN - SCOPUS:65749087109
SN - 0168-9002
VL - 604
SP - 323
EP - 326
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
IS - 1-2
ER -