Nuclear cardiac imaging is the diagnostic technique of using radiology and chemical markers to track cardiac performance. These imaging studies provide a wide range of information about the heart, including how much the heart contracts, the amount of blood supply to the heart and whether parts of the heart muscle are alive or dead. This is essential information for cardiologists, and nuclear imaging has become an increasingly important part of the cardiologist's armoury of diagnostic techniques. Iskandrian's text has become a leading book in the field and the fourth edition will continue the tradition. The text is updated throughout to reflect the many advances in the field, and, as a new feature, each chapter concludes with a question and answer session on important and difficult clinical issues.