The comet-tail artefact is a grey-scale ultrasound finding seen when small calcific / crystalline / highly reflective objects are interrogated and is believed to be a special form of reverberation artifact.
It is similar to the colour comet-tail artefact and is seen in similar situations, although is in general less sensitive than the later.
- small renal or ureteric calculi
- small common bile duct stones
- adenomyomatosis of the gallbladder
- pancreatic calcifications of chronic pancreatitis
- testicular microlithiasis (sometimes)
- thyroid colloid nodules
- identification of foreign bodies
- surgical clips
- catheter tips
- debris / glass / metal
Possible considerations include