Many investigators have pointed out the need for performance measures that describe how well images produced by a medical imaging system aid the end user in performing a particular diagnostic task. To this end we have investigated a variety of imaging tasks to determine the applicability of Bayesian and related strategies for predicting human performance. We have compared Bayesian and human classification performance for tasks involving a number of sources of decision-variable spread, including quantum fluctuations contained in the data set, inherent biological variability within each patient class, and deterministic artifacts due to limited data sets.
Keywords: task performance, statistical decision theory, human observers, Bayesian observers, quantum noise, artifacts, object variability
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