Validation of three-dimensional electronic portal imaging device-based PerFRACTION™ software for patient-specific quality assurance
| Autor: | Thomas McGowan, Kai A. Jones, Jeff Kapatoes, A Aziz Sait, R Ramaseshan, Glenn W Jones, Jason Figueredo |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:Medical physics. Medical radiology. Nuclear medicine
Materials science lcsh:R895-920 Biophysics Dose profile Fluence Phantoms 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Software Portal imaging Validation Dosimetry Radiology Nuclear Medicine and imaging business.industry Patient specific PerFRACTION™ 030220 oncology & carcinogenesis In-vivo dosimetry Ionization chamber Original Article business Quality assurance EPID Biomedical engineering |
| Zdroj: | Journal of Medical Physics, Vol 44, Iss 1, Pp 16-20 (2019) Journal of Medical Physics |
| ISSN: | 1998-3913 0971-6203 |
| Popis: | Purpose: PerFRACTION™ is a three-dimensional (3D) in vivo electronic portal imaging device-based dosimetry software. To validate the software, three phantoms with different inserts (2D array, ionization chamber, and inhomogeneity materials) were constructed to evaluate point dose and fluence map. Materials and Methods: Phantoms underwent independent computed tomography simulation for planning and received repetitive fractions of volumetric modulated arc therapy, simulating prostate treatment. Fluence and absolute point dose measurements, PerFRACTION™ reconstructed doses, and the dose predictions of the planning system were compared. Results: There was concordance between ionization chamber and PerFRACTION™ 3D absolute point dose measurements. Close agreement was also obtained between X- and Y-axis dose profiles with PerFRACTION™ calculated doses, MapCHECK measured doses, and planning system predicted doses. Setup shifts significantly influenced 2D gamma passing rates in PerFRACTION™ software. Conclusions: PerFRACTIONTM appears reliable and valid under experimental conditions in air and with phantoms. |
| Databáze: | OpenAIRE |
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