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Insights into Imaging
Fig. 33 | Insights into Imaging

Fig. 33

From: MRI of acute neck infections: evidence summary and pictorial review

Fig. 33

Subperiosteal hematoma after oral surgery (arrows). The collection is very hypointense on the axial T2-weighted image (a) which would be unusual for an abscess but mimics an abscess on the post-contrast fat-suppressed T1-weighted image (b). DWI of a hematoma can be misleading: the DWI trace image (c) shows T2 dark-through effects, whereas the ADC of the collection (d) looks artifactual and not like a true abscess. Surgery found hematoma

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