This book serves as a 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 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 fifth edition is thoroughly updated and includes new or expanded chapters on nuclear medicine, pediatric radiology, and emerging imaging techniques. A comprehensive question bank, which functions as a valuable self-assessment tool, concludes the book.