- The Physics of Ultrasound – Reflection at Acoustic Media Interfaces
{"Image DocumentName": "- The Physics of Ultrasound \u2013 Reflection at Acoustic Media Interfaces", "Image ImageDescription": "Seeing With Sound. - The Physics of Ultrasound \u2013 Reflection at Acoustic Media Interfaces. Why the acoustic impedance? Analogous to the an index of refraction. Thus we can write the reflection coefficient in terms of the acoustic impedance. And the transmission coefficient: T = 1 \u2013 R. Since Z is proportional to v, the greater the difference in Z\u2019s the larger the reflection coefficient, R. How much of an US wave is reflected at a muscle-fat interface? How much is transmitted? (Zmuscle = 1.7x106 kg/m2s ; Zfat = 1.38x106 kg/m2s) Compare to muscle-bone or muscle-air. (Zair =400kg/m2s; Zbone = 5x106 kg/m2s)", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}