An alternative to gamma histograms for ROI-based quantitative dose comparisons.
An alternative to gamma (gamma) histograms for ROI-based quantitative comparisons of dose distributions using the gamma concept is proposed. The method provides minimum values of dose difference and distance-to-agreement such that a pre-set fraction of the region of interest passes the gamma test. Compared to standard gamma histograms, the method provides more information in terms of pass rate per gamma calculation. This is achieved at negligible additional calculation cost and without loss of accuracy. The presented method is proposed as a useful and complementary alternative to standard gamma histograms, increasing both the quantity and quality of information for use in acceptance or rejection decisions.
Dvorak
P
P
Department of Medical Physics and Clinical Engineering, The Oxford Radcliffe Hospitals NHS Trust, Old Road, Oxford OX3 7LJ, UK. pavel.dvorak@orh.nhs.uk
D000465:Algorithms; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D020266:Radiotherapy, Conformal / Q000379:methods*; D012984:Software; D018511:Systems Integration