Overview: One of the first applications of ultrasound was in submarine sonar equip- ment. Since then ultrasound has found increasing applications, particularly in industry, but increasingly in biomedicine. For many years ultrasound has been used in physical therapy, although only in the past decade or two has it evolved from laboratory curiosity to a well-established diagnostic imaging modality. Ultrasound is now a widely accepted, indeed pervasive, diagnos- tic and therapeutic tool in the medical field, and its applications are increasing rapidly. Our intent in developing this book is to prov
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