The Fifth Edition of this popular text will remain the first choice for those who need current, clinically relevant information on how radiation affects the human body. Written by a practicing, active radiobiologist, the book brings together basic laboratory research and practical, clinical applications. The single-authored, easy-to-read text and informative illustrations ensure comprehension, and summaries at the end of each chapter facilitate quick review. This edition has been reorganized for convenient reference. Brand-new chapters address cancer biology, the clinical response of normal tissues, and gene therapy. Molecular biology is thoroughly integrated into this edition.