Physics and Knobology

Case from The Sono Cave

A middle aged woman presented with vague abdominal pain. No other significant features on history. An ultrasound was performed and the images of the upper abdomen (transverse) are shown.

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What to Know

  1. Understand basic ultrasound physics and define Piezoelectric effect, Frequency, Resolution, Attenuation, Echogenicity and Doppler.
  2. Apply this understanding to machine function and become proficient in knobology. Specifically obtain optimal images by selecting the proper probe, adjusting Image Mode, Gain, Time gain compensation, and Focus.
  3. Recognize ultrasound artifacts and their role in image acquisition including Reverberation, Side lobe, Mirror, Shadowing, Enhancement and Ring-down.

Introduction to Bedside Ultrasound
Free iBook download Vol 1 and Vol 2