Patient specific contouring region of interest for abdominal stereotactic adaptive radiotherapy
- Resource Type
- article
- Authors
- Alex T. Price; Christopher J. Zachary; Eric Laugeman; Borna Maraghechi; Tong Zhu; Lauren E. Henke
- Source
- Physics and Imaging in Radiation Oncology, Vol 25, Iss , Pp 100423- (2023)
- Subject
- Adaptive radiotherapy
SBRT
Gastrointestinal SBRT
MRgRT
CBCTgRT
Medical physics. Medical radiology. Nuclear medicine
R895-920
Neoplasms. Tumors. Oncology. Including cancer and carcinogens
RC254-282
- Language
- English
- ISSN
- 2405-6316
Contouring during adaptive radiotherapy (ART) can be a time-consuming process. This study describes the generation of patient specific contouring regions of interest (CRoI) for evaluating the high dose fall-off in stereotactic abdominal ART. An empirical equation was derived to determine the radius of a cylindrical patient specific CRoIs. These CRoIs were applied to 60 patients and their adaptive fractions (301 unique treatment plans). Out of the 301 unique treatment plans, 284 (94%) treatment plans contained the high dose fall-off within the CRoI. There was an expected predicted average timesaving of 2.9-min-per case. Patient specific CRoIs improves the efficiency of ART.