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Title
Japanese: 
English:Development of large-area, reverse-type APD-arrays for high-resolution medical imaging 
Author
Japanese: Kataoka, J., Koizumi, M., Tanaka, S., Ishibashi, H., Nakamori, T., 河合 誠之, Ikeda, H., Ishikawa, Y., Kawabata, N., Matsunaga, Y., Kishimoto, S., Kubo, H. ..  
English: Kataoka, J., Koizumi, M., Tanaka, S., Ishibashi, H., Nakamori, T., Kawai, N., Ikeda, H., Ishikawa, Y., Kawabata, N., Matsunaga, Y., Kishimoto, S., Kubo, H. ..  
Language English 
Journal/Book name
Japanese: 
English:Nuclear Instruments and Methods in Physics Research A 
Volume, Number, Page Vol. 604        pp. 323-326
Published date June 2009 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1016/j.nima.2009.01.083
Abstract 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) mm for each pixel. An excellent gain uniformity (⩽10%) and low dark noise (⩽0.3nA) 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, 3mm&phis; APD pixel. These results suggest that APD-arrays could be a promising device for future applications in nuclear medicine.

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