Book excerpt: Perfect for residents and fellows to use during rotations, or as a quick review for practicing radiologists and nuclear medicine physicians, Nuclear Medicine: The Essentials is a complete, concise overview of the most important knowledge in this challenging and evolving field. Each chapter begins with learning objectives and ends with board-style questions that help you focus your learning. A self-assessment examination in print and additional self-assessment material online test your mastery of the content and prepare you for exams.