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Unformatted text preview: different types of tissues by using different spring constants, k e.g. Air bubble, gallbladder stone, cancerous tumor Reflection of wave pulses from the end of the chain of mass-springs Suppose nothing is beyond the last mass (#N) – like an air bubble in the intestinal tract. Do waves reflect? Detection of Gallbladder stones Hard stones that form in the gallbladder (usually from condensed cholesterol) that can cause intense pain. The stone has a high density and is hard (not very elastic). Gallstones visible inside a surgically removed and sectioned gallbladder. http://en.wikipedia.org/wiki/Gallstone Model as a rigid immovable object that the ultrasound wave hits at the end in our chain of springs. Ultrasound images Fetus Cardiac abnormality Gallbladder stone Why the shadow? Breast tumors Detecting a cancerous tumor (or any other differing tissue type) with ultrasound A simple model:...
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This note was uploaded on 05/02/2009 for the course PHYS PHYS 1C taught by Professor F during the Spring '00 term at UCSD.
- Spring '00