Evaluation of the RadCalc collapsed cone dose calculation algorithm against measured data.This work describes the experimental validation of the RadCalc (Lifeline software Inc, Tyler) collapsed cone dose calculation algorithm against measured data for a range of scenarios.  These were input into the RadCalc software, in conjunction with head geometry and output calibration information, then used to create a collapsed cone beam model.  However, the primary collimating of the linac is not accounted for in the RadCalc model and hence dose in the corners of large fields is significantly overestimated.  The dose in the build-up region was underestimated by RadCalc Version 7.1.4.1, with (Distance To Agreement) discrepancies of up to 3 mm which were corrected in Version 7.2.2.0.  The largest observed differences were found at density interfaces and a result of the RadCalc dose resolution of 2 mm against 1 mm measured.  Absolute dose comparisons demonstrated that RadCalc agreed with measurement to within 1.2% under homogeneous media irradiation geometries.  The implementation of the (model-based) photon collapsed cone algorithm in RadCalc shows generally good agreement with measured data over a range of simple and complex scenarios considered.
RadCalc
Evaluation of the RadCalc collapsed cone dose calculation algorithm against measured data.This work describes the experimental validation of the RadCalc (Lifeline software Inc, Tyler) collapsed cone dose calculation algorithm against measured data for a range of scenarios. 
Lifeline software Inc
Evaluation of the RadCalc collapsed cone dose calculation algorithm against measured data.This work describes the experimental validation of the RadCalc (Lifeline software Inc, Tyler) collapsed cone dose calculation algorithm against measured data for a range of scenarios. 
Tyler
6 MV photon beam data were measured in a large water tank on a Varian TrueBeam linear accelerator. 
Varian TrueBeam linear accelerator
These were input into the RadCalc software, in conjunction with head geometry and output calibration information, then used to create a collapsed cone beam model. 
RadCalc software