Four-dimensional dose calculations for dynamic tumour tracking with a gimbal-mounted linear accelerator

CONCLUSION: Dynamic tumor tracking plans optimized for a single respiratory phase leave an OAR vulnerable to exceeding its dose constraint during other respiratory phases. The rotation method accurately models the beam's geometry. Using deformable image registration to accumulate dose from all 10 breathing phases provides the most accurate results, however it is a time consuming procedure. Accumulating the dose from two extreme breathing phases (exhale and inhale) and weighting them properly provides accurate results while requiring less time. This approach should be used to confirm the safety of a DTT treatment plan prior to delivery.PMID:34042251 | DOI:10.1002/acm2.13265
Source: Journal of Applied Clinical Medical Physics - Category: Physics Authors: Source Type: research