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Digital and conventional chest imaging: a modified ROC study of observer performance using simulated nodules.
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1986
Year
EngineeringDiagnosisPathologyModified Roc StudyDiagnostic ImagingImage AnalysisBreast ImagingPseudo-roc CurvesBiostatisticsCardiologyNuclear MedicineObserver PerformanceRadiologyCardiovascular ImagingMedical ImagingMedical Image ComputingMultiple NodulesConventional Chest ImagingMultiple Pulmonary NoduleBiomedical ImagingComputer-aided DiagnosisClinical ImageMedicineMedical Image Analysis
A modified receiver operating characteristic (ROC) study was performed in which five readers were asked to locate multiple nodules on images of an anthropomorphic phantom obtained with a prototype digital radiographic chest unit and with a conventional chest unit. Results indicate that when nodules were projected over the lungs, a significantly greater number (significant at the 5% level) were identified on conventional radiographs, whereas for nodules projected over the mediastinum, the digital images were notably superior (difference significant at the 2% level). An error analysis of the multiple nodule problem and pseudo-ROC curves are presented. The modified ROC study does not suffer from the positional ambiguity inherent in most ROC studies and is efficient in acquiring data.