we hypothesize that acute ( less than 10 hr old ) hematomas that contain virtually 100 % intracellular deoxyhemoglobin may not appear hypointense relative to brain on t2-weighted scan sequences at 1.5 t unless surrounding tissue hypoxia and/or anoxia promote additional changes , one of which may be the formation of intracellular methemoglobin .
C0242184
hypoxia
C0003130
anoxia