Thonapan N, Masa-Nga W, Suntiwong S, Dachaworakol K, Thongsawat S, Khamfongkhruea C, et al. Evaluation of the Setup Error using On-Board Imager (OBI) System in Upper Abdominal Cancer. ASEAN J Radiol [Internet]. 2023 Apr. 28 [cited 2024 May 19];16(2):117-21. Available from: https://www.asean-journal-radiology.org/index.php/ajr/article/view/849