@misc{oai:repo.qst.go.jp:00068749,
 author = {Shibuya, Kengo and Yoshida, Eiji and Nishikido, Fumihiko and Suzuki, Tosikazu and Inadama, Naoko and Yamaya, Taiga and Murayama, Hideo and 澁谷 憲悟 and 吉田 英治 and 錦戸 文彦 and 鈴木 敏和 and 稲玉 直子 and 山谷 泰賀 and 村山 秀雄},
 month = {Nov},
 note = {We provide a new viewpoint for a fundamental but little investigated problem in positron emission tomography (PET): non-collinearity of annihilation radiation from the human body. The cause of the small angular deviation from 180 deg is described as well as how to evaluate it under a spatially distrib-uted radiation source and a limited acquisition time. An elegant conversion from the photopeak spectrum into the angular distribution is done based on the conservation laws of momentum and energy to avoid problems in the direct measurement. A healthy volunteer study using 18FDG and a Ge semiconductor detector reveals the distribution as a Gaussian function with the FWHM of 0.54 deg. Finally, we calculate the physical limit of FDG-PET spatial resolution., IEEE 2006 Nuclear Science Symposium and Medical Imaging Conference},
 title = {A Healthy Volunteer FDG-PET Study on the Limit of the Spatial Resolution due to Annihilation Radiation Non-Collinearity},
 year = {2006}
}