Ultrasound.Guide
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Intro and Shadowing

  • Slide 1 of 6
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  • 4
  • 5
  • 6

Artifacts

sample artifact



"Tricks of physics"

  • Identify pathology
  • Avoid pitfalls
  • Optimize image

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Shadowing

Ultrasound beam encounters a “stiff” object

  • Bones
  • Stones

annotated ultrasound image



sensor position

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Shadowing

Gallstones

  • Shadowing is necessary
  • If no shadow consider polyp, sludge


annotated ultrasound gallstones image



sensor position

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Posterior acoustic enhancement

  • Increased brightness in far field when passing trough fluid
  • Adjust gain

annotated ultrasound gallstones image

d


sensor position

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Posterior acoustic enhancement

  • Adjust time-gain-compensation (TGC)
  • Or “i-scan”


posterior acoustic enhancement ultrasound

acoustic enhancement and ultrasound sensor position

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Posterior acoustic enhancement

  • Can help identify abscess, particular when pus is more isoechoic

annotated ultrasound pus image



sensor position

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Artifacts in Ultrasound

--- Table of Contents ---

Lesson NameMinutes id
Intro and Shadowing1 checkmark
241
Edges and Mirrors1
242
Sidelobe1
243
Reverb Comets and Rings1
244
Doppler and Summary1
245

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