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L. De-perfusion, E= temps de transit moyen, F= volume sanguin cérébral) ne montre pas d'hypoperfusion. L'artériographie rapporte une sténose serrée de l'artère cérébrale moyenne droite Ci-dessus

. Ci-dessus, A) montre une hypoperfusion jonctionnelle postérieure gauche Sur la scintigraphie après injection d'acétazolamide, on ne note pas d'altération de la réserve vasculaire cérébrale. La TEP au 18 FDG (C) montre une hypofixation plus large, débordant sur le territoire de l'artère cérébrale postérieure