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Diagnostic evaluation of a PACS subsystem using mammographs. An ROC analysis
P L Klessens1, F H Binkhuysen, F P Ottes
1Department of Radiology, University Hospital Utrecht, The Netherlands.
Medical Informatics = Medecine Et Informatique
|October 1, 1988
Summary
Digital mammography showed lower accuracy in detecting breast calcifications compared to conventional films. Film artifacts in digital images were difficult to distinguish from actual calcifications, impacting radiologist performance.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Mammography is a key tool for breast cancer screening.
- Digital mammography aims to improve image quality and interpretation.
Purpose of the Study:
- To compare the diagnostic accuracy of digitized mammographs versus conventional films.
- To evaluate the detectability of small calcifications in digital versus conventional mammograms.
Main Methods:
- Four radiologists assessed 100 conventional and digitized mammographic films.
- Receiver Operating Characteristic (ROC) methodology was used for analysis.
- The FEASIBLE software package was utilized for experiment management and analysis.
Main Results:
- Conventional films demonstrated significantly higher diagnostic accuracy (average AUC 0.89) than digitized images (average AUC 0.67).
- Film artifacts in digitized images were frequently misidentified as calcifications, reducing diagnostic performance.
Conclusions:
- Conventional mammography remains superior for detecting small breast calcifications.
- Digital mammography systems require further refinement to mitigate artifact-related diagnostic errors.