A patient-specific aperture system with an energy absorber for spot scanning proton beams: Verification for clinical application

Keisuke Yasui, Toshiyuki Toshito, Chihiro Omachi, Yoshiaki Kibe, Kensuke Hayashi, Hiroki Shibata, Kenichiro Tanaka, Eiki Nikawa, Kumiko Asai, Akira Shimomura, Hideto Kinou, Shigeru Isoyama, Yusuke Fujii, Taisuke Takayanagi, Shusuke Hirayama, Yoshihiko Nagamine, Yuta Shibamoto, Masataka Komori, Jun Etsu Mizoe