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APPENDIX Ultrasound Artifacts: A Virtual Chapter

e35

Twinkle Artifact

Twinkle artifact is the artifactual depiction of color signal on

crystalline materials in the body. It appears as discrete foci of

alternating colors with or without an associated color comet-tail

artifact. he appearance of twinkle artifact is highly dependent

on machine settings and is likely generated by a narrow-band,

intrinsic machine noise called “phase (or clock) jitter.” his, along

with a strongly relecting, rough surface such as a renal stone,

results in a high-amplitude, broadband signal appearing as random

motion on color Doppler sonography. he twinkle artifact is

quite useful clinically because it can aid in the detection of small

stones, calciications, and other crystalline material within the

body.

View the PowerPoint illustration of twinkle artifact here

(Video A.22).

FIG. A.67 Calciications in Chronic Pancreatitis With Twinkle

Artifact. 26 (See Chapter 7, Fig. 7.49B.)

FIG. A.66 Twinkle Artifact Posterior to Pancreatic Duct Stone. 26

(See Chapter 7, Fig. 7.48D.)

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