Visual detection and localization of radiographic images
In conventional receiver-operating-characteristic (ROC) curve analysis of visual detection performance, the observer is credited with a true-positive response if a visual signal is present somewhere in a radiograph called ''positive'' by the observer; however, the measured true-positive rate can be different for a given false-positive rate if the observer is required to identify the correct location of the visual signal in order to receive credit for a true- positive response. The authors describe and have confirmed experimentally a model which can be used to predict observer performance in an experiment requiring both detection and localization on the basis of the conventional ROC curve determined in a detection experiment. Implications for the use of signal detection theory in the assessment of radiographic image quality are discussed.
- Research Organization:
- Johns Hopkins Medical Inst., Baltimore
- NSA Number:
- NSA-33-029840
- OSTI ID:
- 4043058
- Journal Information:
- Radiology, v. 116, no. 3, pp. 533-538, Journal Name: Radiology, v. 116, no. 3, pp. 533-538; ISSN RADLA
- Country of Publication:
- United States
- Language:
- English
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