From the case:
Blooming artifact (ultrasound)
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The first image and color Doppler cine recording of the CCA shows signal extending beyond the anatomical limits of the vessel distal to the transducer, due to the inappropriately high color gain (G78).
The second image and recording was taken after the color gain was decreased (G42), but no other parameters were altered. There are only minimal extraluminal color artifacts visible, and only due to vessel pulsation.
Case Discussion
Typical appearance of the ultrasonic blooming artifact, that can obscure partial narrowing (e.g. atherosclerotic plaques, partial thrombosis).