This book will enable practicing physicians and trainees to learn, in a clinically relevant and intellectually stimulating way, guidelines for appropriate ordering of imaging exams. The new edition provides more than 460 clinical case scenarios, organized into subspecialty modules (breast, cardiac, thoracic, gastrointestinal, urologic, women's, pediatric, vascular, musculoskeletal, and neurologic imaging). Each scenario is presented as a quiz in which the reader is invited to select the best option from various imaging modalities. All choices are given ratings of appropriateness and is consistent with the American College of Radiology (ACR) Appropriateness Criteria. Furthermore, a brief solution to each case is included. Finally, over 500 radiologic images are included each associated with a clinical case to illustrate the diagnostic capabilities of the imaging exam. This second edition incorporates new content and revisions to remain consistent with the updated ACR Appropriateness Criteria since the original publication in 2012. It will be an ideal tool both for self-study and for quantitative evaluation of students’ knowledge.