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Science communication is important in today's technologically advanced society. A good part of the adult community is not science saavy and lacks the background to make sense of rapidly changing technology. My blog attempts to help by publishing articles of general interest in an easy to read and understand format without using mathematics. I also give free lectures in community events - you can arrange these by writing to me.

Sunday, 14 June 2015

Medical Imaging - Ultrasound Imaging; On the nature of sound waves

Ultrasound is a safe imaging method as it uses sound waves which are non-ionising form of radiation.  The sound waves are of much higher frequency than the range that human ears are sensitive to.
Variations of ultrasound like Doppler-shifted Ultrasound provide measurement of flow rates (movement) and Harmonic Ultrasound can discriminate between different tissue type effectively.

In the following I reproduce the slides of my talk:





























Change in frequency of sound waves (hence the shift in pitch) is proportional to the speed of the object divided by the speed of sound.










 Some references: This list should be updated ...

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