This book serves as an introduction to the dynamic field of radiology for medical students, non-radiology house staff, physician assistants, nurse practitioners, radiology assistants, and other allied health professionals and provides information that ranges from basic radiographic principles to advanced imaging techniques. It begins with a discussion of the fundamental concepts underlying the medical use of imaging modalities such as ultrasound, computed tomography, magnetic resonance imaging, and nuclear medicine. Subsequent chapters are organized by anatomic region and imaging modality that highlight the radiologist's role in diagnosing and treating common disorders. Each chapter offers learning objectives to aid readers in recognizing important points and connecting the basic radiology concepts. The sixth edition is thoroughly updated. The editors and authors introduce the approach to SAFE radiology, explaining the concepts of S-safety in all modalities, A-appropriateness of imaging ordering, F-interpreting films and E-acting expeditiously on significant findings and executing the recommendation of the imaging findings. Easy to learn and easy to remember, SAFE reminds all health care professionals that safety and appropriateness should precede any imaging testing and that all results should be applied expeditiously and thoughtfully.