Chakraborty, D P Free-response methodology: alternate analysis and a new observer-performance experiment. [electronic resource] - Radiology Mar 1990 - 873-81 p. digital Publication Type: Journal Article ISSN: 0033-8419 Standard No.: 10.1148/radiology.174.3.2305073 doi Subjects--Topical Terms: HumansObserver VariationROC CurveRadiographySoftware