The Fourth Edition of this text provides a clear understanding of the physics principles essential to getting maximum diagnostic value from the full range of current and emerging imaging technologies. Updated material added in areas such as x-ray generators (solid-state devices), xerography (liquid toner), CT scanners (fast-imaging technology) and ultrasound (color Doppler).

The Progress in Medical Radiation Physics series presents in-depth reviews of many of the significant developments resulting from the application of physics to medicine. This series is intended to span the gap between research papers published in scientific journals, which tend to lack details, and complete textbooks or theses, which are usually far more detailed than necessary to provide a working knowledge of the subject. Each chapter in this series is designed to provide just enough information to enable readers to both fully understand the development described and apply the technique or concept, if they so desire. Thorough references are provided for those who wish to consider the original literature. In this way, it is hoped that the Progress in Medical Radiation Physics series will be a catalyst encouraging medical physicists to apply new techniques and developments in their daily practice. Colin G. Orton ix Contents 1-1. The Tracking Cobalt Project: From Moving-Beam Therapy to Three-Dimensional Programmed Irradiation W. A. Jennings 1. Introduction 2. Establishing Moving-Beam Techniques at the Royal Northern Hospital, 1945-1955 4 2.1. Alternative Moving-Beam Techniques 4 2.2.

This volume is presented as a tribute to "two icons from the world of optics"--in the words of editors Harvey (Center for Research and Education in Optics and Lasers, U. of Central Florida) and Hooker (electrical and computer and engineering, U. of Colorado)--both of whom have been affiliated with the Optical Sciences Center at the U. of Arizona. Twenty-one papers from a tribute conference, some highly technical and others more personal, detail the honorees contributions to optics and optics education. These are followed by 45 journal article reprints authored by Bob Shannon and Roland Shack or their students in the technical areas of optical design and analysis, image evaluation, applications of the marginal ray height--chief ray height diagram, optical testing, optical fabrication, phased telescope arrays, aberration theory, propagation effects in the atmosphere, and diffraction/surface scatter phenomena. Finally, 14 short, informal "anecdotes and accolades" of the two scientists are presented from the conference and elsewhere. Annotation :2005 Book News, Inc., Portland, OR (booknews.com).