Assessment of the dosimetric accuracies of CATPhan 504 and CIRS 062 using kV-CBCT for performing direct calculations

JamesKwame Annkah, Naina Hindocha, SyedAli Moinuddin, Kate Ricketts, Ivan Rosenberg, Gary Royle, Abiodun Adeyemi
2014 Journal of Medical Physics  
The dosimetric accuracies of CATPhan 504 and CIRS 062 have been evaluated using the kV-CBCT of Varian TrueBeam linac and Eclipse TPS. The assessment was done using the kV-CBCT as a standalone tool for dosimetric calculations towards Adaptive replanning. Dosimetric calculations were made without altering the HU-ED curves of the planning computed tomography (CT) scanner that is used by the Eclipse TPS. All computations were done using the images and dataset from kV-CBCT while maintaining the
more » ... calibration curve of the planning CT (pCT), assuming pCT was used for the initial treatment plan. Results showed that the CIRS phantom produces doses within ±5% of the CT-based plan while CATPhan 504 produces a variation of ±14% of the CT-based plan.
doi:10.4103/0971-6203.139001 pmid:25190991 pmcid:PMC4154180 fatcat:cvf2nu7bqjgmhjo4c3snpdy4zu