ULTRASOUND

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• Send waves into body which are reflected at the interfaces between tissue.
• Return time of the waves tells us of the depth of the reflecting surface
• Is oscillating sound pressures waves with a frequency greater than the upper limit
• Ultrasound are used fro so many things since theg have been invented

HOW ULTRASOUND IS USEFUL

• First practical application,1912 unsuccessful for Titanic
• WW II brought massive military research -SONAR
• Mid century used for non destructive testing
• First used as diagnostic tool in 1942 for brain tumors
• 1950 2D gray scale images

ULTRASOUND

• Started in 1912 and now is useful in every day

ULTRASOUND MACHINE