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Artifacts
Doppler and Summary
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Doppler Artifacts
“Twinkling”
Can improve detection of kidney stones
Narration
Doppler Artifacts
‘Aliasing’
When speed is so fast it “wraps”
Sudden shift – from blue to yellow
Affected by scale – here >59 cm/s
Narration
Other Artifacts
Lateral resolution (beam width)
Elevational resolution (section thickness)
Axial resolution
Multipath
Others
… be aware that things are not always as they appear!
Narration
Artifacts
Summarize:
Beware artifacts…
…use artifacts!
Narration
Lessons
Intro and Shadowing.
Edges and Mirrors.
Sidelobe.
Reverb Comets and Rings.
✓
Doppler and Summary
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Author
Dr. Christopher Moore
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