Transient reduction in venous susceptibility during posterior reversible encephalopathy syndrome
Résumé
We report a case of Posterior Reversible Encephalopathy Syndrome (PRES) in which
followed-up MRI demonstrated a transient reduction in venous signal on initial SWAN
images. The progressive normalization of venous signal on D10 and D40 imaging
paralleled the progressive decrease of hyperperfusion on CBF images. Decreased venous
susceptibility has never been reported in PRES; it relates most likely to a transient BOLD
effect induced by brain hyperperfusion.
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