Correlation between patient-specific quality assurance in volumetric modulated arc therapy and 2D dose image features.

ABSTRACT: In radiotherapy, air-filled ion chamber detectors are ubiquitously used in routine dose measurements for treatment planning. However, its use has been restricted by intrinsic low spatial resolution barriers. We developed one procedure for patient-specific quality assurance (QA) in arc radiotherapy by coalescing two adjacent measurement images into a single image to improve spatial resolution and sampling frequency, and investigated how different spatial resolutions affect the QA results. PTW 729 and 1500 ion chamber detectors were used for dosimetric verification via coalescing two measurements with 5 mm-couch shift and the isocenter, and only isocenter measurement, which we call coalescence and standard acquisition (SA). Statistical process control (SPC), process capability analysis (PCA)

SUBMITTER: Guo Y 

PROVIDER: S-EPMC10006091 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature