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Detection of low-contrast lesions in computed body tomography: an experimental study of simulated lesions.
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1980
Year
Computed TomographyEngineeringLow-contrast LesionsComputed Body TomographyDiagnostic ImagingNoise ReductionImage AnalysisSimulated LesionsCt ScanPhoton-counting Computed TomographyNuclear MedicineRadiologyMedical ImagingStandard DeviationNeuroimagingObserver AccuracyContrast AgentMedical Image ComputingRadiographic ImagingBiomedical ImagingMedicineTomography
Observer accuracy in the identification of low-contrast objects in computed tomography (CT) was studied. Thresholds were established for detection of lesions of various sizes and attenuation differences in CT images produced at different radiation doses. Noise reduction was important in identifying certain types of lesions. Detection was not accurate when the standard deviation of the mean of an organ exceeded the difference in the means of the lesion and the surround region.