Assessment of upright immobilization methods for abdominal and head-and-neck cancer treatments in a carbon ion radiotherapy setting.

ABSTRACT:

Background and purpose

Upright patient positioning is an emerging approach in radiotherapy that may overcome current limitations in carbon ion radiotherapy (CIRT). This study evaluated upright immobilization techniques for abdominal and head-and-neck (HN) cancers in a CIRT setting.

Materials and methods

Ten volunteers were positioned on the Chair, a demo upright positioning system (Leo Cancer Care, USA). Three setups were evaluated: no immobilization devices, vacuum bags alone (ESFORM; Engineering System Co., Japan), and vacuum bags with a thermoplastic shell (Shellfitter; Kuraray Trading Co., Japan), called the "shell" setup. Interfractional and intrafractional errors were assessed using skin markers drawn on the abdominal and HN areas. Interfractional shifts per direction

SUBMITTER: Varnava M 

PROVIDER: S-EPMC12686792 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature