Feasibility of direct brain 18F-fluorodeoxyglucose-positron emission tomography attenuation and high-resolution correction methods using deep learning oleh Tomohiro Ueda, Kousuke Yamshita, Retsu Kawazoe, Yuta Sayawaki, Yoshiki Morisawa, Ryosuke Kamezaki, Ryuji Ikeda, Shinya Shiraishi, Yoshikazu Uchiyama, Shigeki Ito