Searchlight phenomenon: a novel artifact of the gallbladder

Conclusion
The searchlight phenomenon is thought to be a range-ambiguity artifact of the ring-down artifact. Duodenal gas is thought to give rise to this artifact. When examining the gallbladder with ultrasound, knowledge of many artifacts including the searchlight phenomenon can prevent us from making a hazardous misdiagnosis.

Source: Journal of Medical Ultrasonics - January 9, 2016 Category: Radiology Source Type: research