Density scaling artifacts in dosimetry calculations.
Quality assurance dosimetry often requires the comparison of measured doses with those calculated by a treatment-planning system for phantoms of density other than 1.000 g/cm3. The presence of an artifact in the Pinnacle3 treatment-planning system can lead to systematic errors in such cases. These errors are also present, although reduced in magnitude, in heterogeneous media.
Dickof
Peter
P
Department of Medical Physics, Allan Blair Cancer Centre, Regina, Saskatchewan S4S 1V4, Canada. Peter.Dickof@scf.sk.ca
D016477:Artifacts; D003627:Data Interpretation, Statistical; D011785:Quality Assurance, Health Care / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D012986:Software Validation