Assessment of intra-fraction motion during frameless image guided Gamma Knife stereotactic radiosurgery. (January 2023)

• Record Type: Journal Article
• Authors: Li, Winnie; Bootsma, Gregory; Shultz, David; Laperriere, Normand; Millar, Barbara-Ann; Cho, Young Bin; Jaffray, David A.; Chung, Caroline; Coolens, Catherine
• Is Part Of: Physics and imaging in radiation oncology. Volume 25(2023)
• Publication Date: 2023-01
• Subjects: Intrafraction motion -- Gamma Knife -- Stereotactic radiosurgery -- Image guidance; Radiotherapy -- Periodicals; Radiation dosimetry -- Periodicals; Cancer -- Imaging -- Periodicals; Oncology -- Periodicals; 615.842
• DOI: 10.1016/j.phro.2023.100415
• Languages: English
• ISSNs: 2405-6316

Abstract

Abstract: As frameless stereotactic radiosurgery increase in use, the aim of this study was to evaluate intra-fraction motion through cone-beam CT (CBCT) and high-definition motion management (HDMM) systems. Intra-fraction motion measured between localization, repeat localization and post-treatment CBCTs were correlated to intra-faction motion indicated by the HDMM files using the Pearson coefficient (r). A total of 302 plans were reviewed from 263 patients (114 male, 149 female); 216 pairs of localization-repeat localization, and 260 localization–post-treatment CBCTs were analyzed against HDMM logs. We found the magnitude of intra-fraction motion detected by the HDMM system were larger than the corresponding CBCT results.