Journal: Journal of Applied Clinical Medical Physics

Article Title: Sensitivity and specificity of Varian Halcyon's portal dosimetry for plan‐specific pre‐treatment QA

doi: 10.1002/acm2.14001

Figure Lengend Snippet: ROC curves for the QA tool comparison. The investigated plan acceptance criteria include γ 2%/2 mm , γ 2%/1 mm , and γ 1%/1 mm for PD and γ 3%/3 mm , γ 3%/2 mm , and γ 2%/2 mm for ArcCHECK gamma analysis. (a) ROC analysis per treatment plan. While ArcCHECK measurements were evaluated for the entire plan, for PD the worst arc's gamma passing rate was assigned to each plan. (b) ROC analysis for PD measurements analyzed per treatment field. Higher diagnostic performance is indicated by curves with larger area under the ROC curve.

Article Snippet: Based on the dedicated ROC analysis tool, as provided by OriginPro v.9.0 (OriginLab, Northampton, MA), sensitivity and specificity for both PD and ArcCHECK QA using the aforementioned assessment at varying decision thresholds were evaluated.

Techniques: Comparison, Diagnostic Assay