@misc{oai:repo.qst.go.jp:00068754,
 author = {Yoshida, Eiji and Kobayashi, Ayako and Yamaya, Taiga and Watanabe, Mitsuo and Nishikido, Fumihiko and Kitamura, Keishi and Hasegawa, Tomoyuki and Murayama, Hideo and et.al and 吉田 英治 and 小林 彩子 and 山谷 泰賀 and 錦戸 文彦 and 北村 圭司 and 長谷川 智之 and 村山 秀雄},
 month = {Nov},
 note = {We have developed a high-performance brain PET scanner, jPET-D4. This scanner is designed to achieve not only high spatial resolution but also high sensitivity using four-layered depth-of-interaction (DOI) detectors. The scanner has five block detector rings with the ring diameter of 390 mm and each block detector ring consists of 24 DOI detectors. In this paper, we describe the system description and performance evaluation of the jPET-D4. Especially, scatter fraction, sensitivity and count-rate performance of the jPET-D4 are evaluated using the NEMA NU2-2001 standard. The average scatter fraction for this system is 42 % with energy window of 400-600 keV. The sensitivity at center FOV is 19.5 kcps/MBq with energy window of 400-600 keV. Peak NECRs (NEC1R and NEC2R) with 10 ns coincidence time window are 82 kcps at 8.7 kBq/ml and 56 kcps at 7.6 kBq/ml, respectively. These evaluation measurements promise the jPET-D4 has excellent performance., IEEE 2006 Nuclear Science Symposium, Medical Imaging Conference},
 title = {The jPET-D4: Performance evaluation of four-layer DOI-PET scanner using the NEMA NU2-2001 standard},
 year = {2006}
}