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The physical properties of ultrasound, particularly its highly directional beam behaviour, and its complex interactions with human tissues, have led to its becoming a vitally important tool in both investigative and interventional medicine, and one that still has much exciting potential. This new edition of a well-received book treats the phenomenon of ultrasound in the context of medical and biological applications, systematically discussing fundamental physical principles and concepts. Rather than focusing on earlier treatments, based largely on the simplifications of geometrical acoustics, this book examines concepts of wave acoustics, introducing them in the very first chapter. Practical implications of these concepts are explored, first the generation and nature of acoustic fields, and then their formal descriptions and measurement. Real tissues attenuate and scatter ultrasound in ways that have interesting relationships to their physical chemistry, and the book includes coverage of these topics. Physical Principles of Medical Ultrasonics also includes critical accounts and discussions of the wide variety of diagnostic and investigative applications of ultrasound that are now becoming available in medicine and biology. The book also encompasses the biophysics of ultrasound, its practical applications to therapeutic and surgical objectives, and its implications in questions of hazards to both patient and operator.
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Nuclear energy will inevitably become an important issue worldwide in the 21st century. It pollutes the environment, with consequences that are highly controversial; and it generates plutonium — the essential component of nuclear weapons. At the same time, it is a realistic alternative to at least some of the expected huge increase in global demand for fossil-fuel burning, which itself is a major source of environmental pollution, and not least of “greenhouse” gases.This invaluable book attempts to provide, for the non-technical reader, an objective and critical account of the main issues involved. The authors are authorities in their own fields, and their contributions have been read in manuscript, discussed and criticised by a wider, international group of experts. Thus, whilst much of its contents may arouse controversy, the book should be an excellent starting point for informed public discussion of a vitally important topic.