The 3-7 Rule

This rule is useful in estimating the age of blood in MRI images of intracerebral heomrrhages.  Mnemonic:  It Be IdDy BiDdy BaBy DooDoo. 

The 3-7 Rule pertains to the timeframe of the bleed:  {<7h-3d-7d->3w}Capture

Capture.JPG

Reference

Bhardwaj, Anish, and Marek Alexander Z Mirski. Handbook Of Neurocritical Care. New York: Springer, 2010. Print.

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