Written by a leading international authority in the field, this book is ideal for physicians and residents in nuclear medicine who want to improve their knowledge in internal dosimetry. The text is a practical introduction that guides the reader through fundamental concepts in the calculation of radiation dose, including discussions of standardized models, methods of calculations, and available software applications. This comprehensive guide discusses too the biological effects of radiation on living systems. The book also includes an overview of regulatory aspects related to the radiation dosimetry of new radiopharmaceuticals.