“…However, the added cost and technical complexities in constructing and maintaining rotating gantries have limited their use, especially in CIRT centers [ 5 , 6 ]. As a result, of the 13 CIRT centers in the world currently in operation as of June 2022, only three utilize rotating gantries: the Heidelberg Ion Therapy Center in Heidelberg, Germany, which has a gantry weighing 600 tons, the QST Hospital in Chiba, Japan, which has a superconducting rotating gantry weighing about 300 tons, and the East Japan Heavy Ion Center at Yamagata University Hospital in Yamagata, Japan, with a superconducting rotating gantry weighing about 200 tons [ 7 , 8 , 9 , 10 , 11 ]. Two CIRT centers are currently in development in South Korea that will employ a combination of fixed beam and rotating gantry systems; one at Yonsei University Hospital in Seoul and one at Seoul National University Hospital in Busan, and these centers will employ the same gantry system used at Yamagata University Hospital [ 1 ].…”