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Diagnostic ultrasound ( PDFDrive )

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e20

APPENDIX

Ultrasound Artifacts: A Virtual Chapter

Click here to see a video clip of ring-down artifact in

peripheral ducts of the liver (Video A.15).

Dirty Shadowing Artifact

Dirty shadowing results from a combination of relection,

reverberation, and ring-down artifacts arising from multiple

variably sized bubbles in foam. 16

Click here to see an explanatory video of dirty shadowing

artifact (Video A.16).

FIG. A.35 Ring-Down Artifact. Iatrogenic air in the bladder introduced

at cystoscopy appears as a nondependent bright region with ring-down

artifact. 18 (See Chapter 9, Fig. 9.36.)

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