Improved understanding of the pathophysiologic changes in different diseases, including the molecular mechanisms of pathologic conditions such as tumors, has enhanced our ability to apply non- invasive techniques to investigate these diseases and permitted earlier detection and better management. It has also expanded the use of functional imaging, including molecular imaging. This synopsis is a companion to The Pathophysiologic Basis of Nuclear Medicine and arose from the recognition that there is a need for a compact, readable account of this complex and important subject. The companion book concisely describes relevant anatomic and physiologic considerations for each organ system and the pathophysiologic features of different relevant diseases, and relates them to the scintigraphy of each system. It thereby provides an informative synopsis of the pathophysiologic basis of nuclear medicine and molecular imaging. The volume will serve as a quick reference that will help the reader to understand different scintigraphic patterns and to select appropriate treatment modalities based on functional imaging. It will prove useful to undergraduates and postgraduates as well as to practitioners in clinical and research fields.