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Diagnostic ultrasound ( PDFDrive )

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e28

APPENDIX

Ultrasound Artifacts: A Virtual Chapter

FIG. A.53 Flash Artifact From Pulsation. In this image of the left portal vein, note how transmitted pulsation from the heart causes artifactual

low in the adjacent liver owing to motion.

Tissue Vibration Artifact

Tissue vibration artifact consists of color pixels erroneously

placed in the adjacent sot tissue by the ultrasound scanner

because of the transmitted vibration from a region of marked

turbulence. It is commonly seen with shunts, tight stenoses of

large arteries, and especially arteriovenous istulas. If tissue

vibration artifact is seen, a search should be made for an arteriovenous

istula.

A

FIG. A.54 Tissue Vibration Artifact From Common Femoral Artery

to Common Femoral Vein Arteriovenous Fistula. Turbulent low

through the istula may affect surrounding tissues, causing a tissue

vibration artifact, which may be the irst clue that an arteriovenous istula

(AVF) is present. Common femoral artery to common femoral vein

AVF. (A) Color Doppler shows common femoral artery to common

femoral vein AVF. Note the adjacent tissue vibration artifact (arrowheads).

(See Chapter 27, Fig. 27.14.)

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