Susceptibility artefact on brain MRI due to gas bubbles

Case contributed by Dr Chris O'Donnell


Post-operative examination immediately following excision of posterior fossa mass

Patient Data

Age: 65
Gender: Male

Multiple low signal intensity rounded filling defects with in the subarachnoid space and lateral ventricles anteriorly.  These are poorly seen on the FLAIR sequence, better seen on T2-weighting and "bloom" on the SWI sequence.

Case Discussion

It is important to recognize artefacts on MRI in order to avoid error in reporting.  The clinical history in this case is important as well as the distribution of the signal alteration (floating anteriorly with the patient in a supine position).

PlayAdd to Share

Case information

rID: 58168
Published: 4th Feb 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.