MRI susceptibility artifact due to dry hair shampoo

Case contributed by Chris O'Donnell , 23 May 2017

Diagnosis certain

Changed by Daniel J Bell, 20 Sep 2020

Updates to Case Attributes

Title was changed:

MRI susceptibility ~~artefact~~artifact due to dry hair shampoo

Presentation was changed:

Chronic headache. ~~Artefact~~Artifact on MRI scan. Patient sent home to wash hair and returned for repeat imaging.

Body was changed:

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Dry shampoo is used to remove grease from unwashed hair and contains:

cornstarch: to bind fatty acids
kaolin: to absorb grease
Laminaria saccharina (type of seaweed) extract: ~~anti-clumping~~anticlumping agent to reduce caking of the ~~corn starch~~cornstarch and kaolin
magnesium stearate: also an anticlumping agent
denatured alcohol: solvent for the cornstarch and kaolin
liquefied petroleum gas: propellant for the spray can

The kaolin, cornstarch and magnesium ~~can~~may all cause ~~artefact~~artifacts due to local magnetic field distortion, most prominently seen on the echo-planar sequences, i.e. DWI and SWI.

~~-Laminaria saccharina extract: anti-clumping agent to reduce caking of the corn starch and kaolin</li>~~
+Laminaria saccharina (type of seaweed) extract: anticlumping agent to reduce caking of the cornstarch and kaolin</li>
-</ul>The kaolin, cornstarch and magnesium can all cause artefact due to <a href="/articles/magnetic-susceptibility-artifact">local magnetic field distortion</a>, most prominently seen on the <a href="/articles/echo-planar-imaging-1">echo-planar sequences</a>, i.e. <a href="/articles/diffusion-weighted-imaging-1">DWI</a> and <a href="/articles/susceptibility-weighted-imaging-1">SWI</a>.
+</ul>The kaolin, cornstarch and magnesium may all cause artifacts due to <a href="/articles/magnetic-susceptibility-artifact">local magnetic field distortion</a>, most prominently seen on the <a href="/articles/echo-planar-imaging-1">echo-planar sequences</a>, i.e. <a href="/articles/diffusion-weighted-imaging-2">DWI</a> and <a href="/articles/susceptibility-weighted-imaging-1">SWI</a>.

Title was removed:

~~MRI susceptibility artefact due to dry hair shampoo~~

Type was removed.

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