Physics and Instrumentation
Physics and Instrumentation Sound is a mechanical vibration transmitted through an elastic medium. When it propagates through air at the appropriate frequency, sound may produce the sensation of hearing. Ultrasound…
History of Echocardiography
History of Echocardiography Harvey Feigenbaum, M.D. Many histories of diagnostic ultrasound, and cardiac ultrasound in particular, have been written.1, 2, 3, 4, 5 and 6 They all seem to address…
