Satoshi Kito, Yuhi Suda, Satoshi Tanabe, Takeshi Takizawa, Tomomasa Nagahata, Naoki Tohyama, Hiroyuki Okamoto, Takumi Kodama, Yukio Fujita, Hisayuki Miyashita, Kazuya Shinoda, Masahiko Kurooka, Hidetoshi Shimizu, Takeshi Ohno, Masataka Sakamoto
Previous studies have primarily focused on quality of imaging in radiotherapy planning computed tomography (RTCT), with few investigations on imaging doses. To our knowledge, this is the first study aimed to investigate the imaging dose in RTCT to determine baseline data for establishing national diagnostic reference levels (DRLs) in Japanese institutions. A survey questionnaire was sent to domestic RT institutions between 10 October and 16 December 2021. The questionnaire items were volume computed tomography dose index (CTDIvol), dose-length product (DLP), and acquisition parameters, including use of auto exposure image control (AEC) or image-improving reconstruction option (IIRO) for brain stereotactic irradiation (brain STI), head and neck (HN) intensity-modulated radiotherapy (IMRT), lung stereotactic body radiotherapy (lung SBRT), breast-conserving radiotherapy (breast RT), and prostate IMRT protocols...
December 26, 2023: Journal of Radiation Research