Receiver-operating characteristic (ROC) analysis has proven to be a powerful method for dealing with misclassification costs and skewed class distributions (Provost & Fawcett, 1998). In the typical representation, an ROC analysis evaluates false accept versus false reject rates for a set of candidate binary classifiers under all possible (linear) cost and prior class distribution assumptions. T...

BACKGROUND We hypothesized that a sphere mapped to specific preserved nonarticular landmarks of the proximal humerus can accurately predict native humeral head radius of curvature (ROC) and head height (HH) in the osteoarthritic, deformed humeral head. METHODS Three consistent nonarticular landmarks were defined with a 3-dimensional sphere (and 2-dimensional circle in midcoronal plane) placed...

objective: after introduction of digital radiography into dentistry several methods of image acquisition were accessible in the field of dentistry. in many instances it is necessary to digitize analog images. there is no overall acceptable method for image digitization so all different types of images can be comparable. the objective of this study was to compare the diagnostic accuracy of diffe...