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Radiol Case Rep. 2019 May 14;14(7):889-893. doi: 10.1016/j.radcr.2019.04.014. eCollection 2019 Jul.

Appearance of cerebral infarct fogging on CT perfusion.

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1
Department of Radiology and Imaging Sciences, Emory University School of Medicine, 100 Woodruff Circle, Atlanta, GA 30322, USA.

Abstract

Fogging is a deceptive phenomenon that can partially or completely obscure a subacute infarct on noncontrast head CT. We present the appearance of infarct fogging on CT perfusion through 3 cases. At time of fogging, the subacute infarctions demonstrated variable mean transit time with increased cerebral blood volume and cerebral blood flow on CT perfusion. Fogging occurred within 6-10 days, sooner than the previously described 2-3 weeks in classic fogging. At time of fogging, CT perfusion demonstrated a "luxury-like" perfusion pattern and augmented the identification of the true extent of the infarction at time of fogging.

KEYWORDS:

CT perfusion; Cerebral infarct/stroke; Fogging effect; Noncontrast head CT; Vasospasm

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