VGC ANALYZER: A SOFTWARE FOR STATISTICAL ANALYSIS OF FULLY CROSSED MULTIPLE-READER MULTIPLE-CASE VISUAL GRADING CHARACTERISTICS STUDIES

Radiation Protection Dosimetry
M Båth, Jonny Hansson

Abstract

Visual grading characteristics (VGC) analysis is a non-parametric rank-invariant method for analysis of visual grading data. In VGC analysis, image quality ratings for two different conditions are compared by producing a VGC curve, similar to how the ratings for normal and abnormal cases in receiver operating characteristic (ROC) analysis are used to create an ROC curve. The use of established ROC software for the analysis of VGC data has therefore previously been proposed. However, the ROC analysis is based on the assumption of independence between normal and abnormal cases. In VGC analysis, this independence cannot always be assumed, e.g. if the ratings are based on the same patients imaged under both conditions. A dedicated software intended for analysis of VGC studies, which takes possible dependencies between ratings into account in the statistical analysis of a VGC study, has therefore been developed. The software-VGC Analyzer-determines the area under the VGC curve and its uncertainty using non-parametric resampling techniques. This article gives an introduction to VGC Analyzer, describes the types of analyses that can be performed and instructs the user about the input and output data.

References

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Citations

Mar 16, 2018·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Alexander FyrdahlAndreas Sigfridsson
Sep 21, 2017·Acta Radiologica·David SchmidtPeter Leander
Feb 13, 2020·La Radiologia medica·Massimo CristofaroVincenzo Schinina'
Jan 25, 2020·European Radiology·Seyedamir Tavakoli TabaPatrick C Brennan
Mar 5, 2021·Acta Radiologica·Simon GötestrandMats Geijer
Apr 6, 2021·European Journal of Radiology·Joana BoitaIoannis Sechopoulos
Aug 12, 2021·European Radiology·Simon GötestrandMats Geijer
Jul 28, 2020·Academic Radiology·Maral MirzaiAngelica Svalkvist

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