Comet tail artifact

Changed by Henry Knipe, 24 Jun 2014

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The comet-tail artefact is a grey-scale ultrasound finding seen when small calcific / crystalline / highly reflective objections are interrogated, and is believed to be a special form of reverberation artefact.

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
adenomyomatosisof the gallbladder
pancreatic calcifications of chronic pancreatitis
testicularmicrolithiasis (sometimes)
identification of foreign bodies
- surgicalclips
- catheter tips
- debris / glass / metal

-The comet-tail artefact is a grey-scale ultrasound finding seen when small calcific / crystalline / highly reflective objections are interrogated, and is believed to be a special form of <a href="/articles/reverberation-artefact" title="reverberation artefact">reverberation artefact</a>. It is similar to the <a href="/articles/colour-comet-tail-artefact-1" title="Colour comet-tail artefact">colour comet-tail artefact</a> and is seen in similar situations, although is in general less sensitive than the later. <ul><li>small <a href="../../../../articles/nephrolithiasis" title="Nephrolithiasis">renal or ureteric calculi</a></li><li>small
- <a href="../../../../articles/choledocholithiasis" title="Common bile duct stones">common bile duct stones</a></li><li><a href="../../../../articles/adenomyomatosis-of-gallbladder" title="Adenomyomatosis of gallbladder">adenomyomatosis
-of the gallbladder</a></li><li>pancreatic calcifications of <a href="/articles/chronic-pancreatitis" title="chronic pancreatitis">chronic pancreatitis</a></li><li><a href="../../../../articles/testicular-microlithiasis" title="Testicular microlithiasis">testicular
~~-microlithiasis</a> (sometimes)</li><li>identification of foreign bodies<ul><li>surgical~~
~~- clips</li><li>catheter tips</li><li>debris / glass / metal</li></ul></li></ul>~~
+The comet-tail artefact is a <a href="/articles/grey-scale-imaging">grey-scale ultrasound</a> finding seen when small calcific / crystalline / highly reflective objections are interrogated, and is believed to be a special form of <a href="/articles/reverberation-artefact">reverberation artefact</a>. It is similar to the <a href="/articles/colour-comet-tail-artefact-1">colour comet-tail artefact</a> and is seen in similar situations, although is in general less sensitive than the later. <ul>
+<li>small <a href="/articles/nephrolithiasis">renal or ureteric calculi</a>
+</li>
+<li>small <a href="/articles/choledocholithiasis">common bile duct stones</a>
+</li>
+<li><a href="/articles/adenomyomatosis-of-gallbladder">adenomyomatosis of the gallbladder</a></li>
+<li>pancreatic calcifications of <a href="/articles/chronic-pancreatitis">chronic pancreatitis</a>
+</li>
+<li>
+<a href="/articles/testicular-microlithiasis">testicular microlithiasis</a> (sometimes)</li>
+<li>identification of foreign bodies<ul>
+<li>surgical clips</li>
+<li>catheter tips</li>
+<li>debris / glass / metal</li>
+</ul>
+</li>
+</ul>

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Image 1 Photo ( update )

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Figure 1: comet-tail

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Image 2 Ultrasound (multiple) ( update )

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Comet tail artifact

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Image 2 Ultrasound (multiple) ( update )

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