Open AccessInitial commissioning measurements of respiratory gated liver VMAT stereotactic ablative body radiotherapy
Author(s) -
K M Alexander,
A Kerr,
T Olding
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1305/1/012027
Subject(s) - dosimeter , imaging phantom , nuclear medicine , ionization chamber , sabr volatility model , ablative case , materials science , radiation treatment planning , radiation therapy , dosimetry , ion , medicine , physics , radiology , mathematics , volatility (finance) , stochastic volatility , quantum mechanics , econometrics , ionization
A dosimetric evaluation of a respiratory gated VMAT SABR technique was performed at two different beam energies. Dynamic ion chamber, EBT3 film and Fricke-xylenol orange-gelatin (FXG) gel measurements were acquired using a motion phantom with custom inserts for each dosimeter. Ion chamber and gel dosimeter measurements show good agreement between the measured and calculated plan dose within the planning target volume (PTV). Lower agreement than expected was observed between calculated plan dose and measured film dose, particularly for the 10 MV flattening filter free beam plan, a result that warrants further investigation.