![](https://d3hj8eczelsk9p.cloudfront.net/wp-content/uploads/2016/09/24144932/crab-pot-trees-christmas-yard-decorations-g3m-64_1000.jpg)
Images by Genevieve Carbonatto
These are reverberation artifacts produced because sound waves reverberate between the cholesterol crystals and the wall of the gallbladder.
Colour Doppler: The wall of the GB seems to light up like a christmas tree due to these reverberation artifacts.
Reverberation artifacts with colour Doppler.