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Home > All Images > 1998 > November > 6 Nov 1998

Images Dated 6th November 1998

Choose from 9 pictures in our Images Dated 6th November 1998 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for Quick Shipping.


Artwork of a hand holding an ultrasound transducer Featured 6 Nov 1998 Print

Artwork of a hand holding an ultrasound transducer

Ultrasound transducer. Computer artwork of a hand holding an ultrasound transducer. The transducer can be used as a diagnostic tool for foetal scanning, diagnosing organ diseases and detecting blood flow rates. The wave pattern coming from the transducer (at lower centre) represents sound waves of very high frequency (ultrasonic waves). When used as diagnostic tool, the transducer is placed onto the patient's skin. A small piezoelectric device in the scanner head generates an ultrasound signal. The ultrasound is reflected by different amounts by different tissues. The reflected signals are picked up by the scanner head and processed to create the ultrasound image

© DAVID GIFFORD/SCIENCE PHOTO LIBRARY