A comparative study of three small-field detectors for patient specific stereotactic arc dosimetry
| Autor: | Luke K Webb, Emma Inness, Paul Charles |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Biomedical Engineering Biophysics General Physics and Astronomy Dose profile Scintillator Imaging phantom 030218 nuclear medicine & medical imaging law.invention Stereotaxic Techniques 03 medical and health sciences 0302 clinical medicine Optics law Humans Dosimetry Radiology Nuclear Medicine and imaging Neoplasm Metastasis Radiometry BrainLab iPlan Dosimeter business.industry Radiotherapy Planning Computer-Assisted Detector Uncertainty Reproducibility of Results Dose-Response Relationship Radiation Collimator 030220 oncology & carcinogenesis business |
| Zdroj: | Australasian Physical & Engineering Sciences in Medicine. 41:217-223 |
| ISSN: | 1879-5447 0158-9938 |
| DOI: | 10.1007/s13246-018-0622-2 |
| Popis: | This paper examines the difference in patient specific dosimetry using three different detectors of varying active volume, density and composition, for quality assurance of stereotactic treatments. A PTW 60017 unshielded electron diode, an Exradin W1 scintillator, and a PTW 31014 PinPoint small volume ionisation chamber were setup in a Lucy 3D QA phantom, and were positioned at the isocentre of an Elekta Axesse, with beam modulator collimator, using Exactrac and a HexaPODTM couch. Dose measurements were acquired for 43 stereotactic arcs, and compared to BrainLAB iPlan version 3.0.0 treatment planning system (TPS) calculations using a pencil beam algorithm. It was found that for arcs with field sizes $$>15$$ mm, the properties of a detector have minimal impact on the measured doses, with all three detectors agreeing with the TPS (to within 5%). However, for field sizes $$ |
| Databáze: | OpenAIRE |
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