A 65-year-old female patient was diagnosed to have multiple gallstones. The resident performed a follow up scan and activated color Doppler and positioned the color Doppler box in the region of the gallstones. The gallstones showed some color Doppler signal. This is known as:
A. Color Doppler color enhancement.
B. Color Doppler bleeding artifact.
D. Twinkle artifact.
(See answer below)
Answer: D, Twinkle artifact.
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