Imaging Differential Diagnosis and Discussion. Following the oral board examination format, this case-based review book is considered one of the standards in board review. It is a well-known ancillary to the respected and well-attended board review course given by the prestigious Duke University Department of Radiology. The case presentations are structured to follow the way residents are taught to work through a case. This Second Edition has new cases throughout. It places greater emphasis on differential diagnosis and provides more understanding of false diagnoses.