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Imaging the penumbra in acute stroke

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Abstract

Imaging continues to have a huge impact on the understanding of the ischemic penumbra and the management of acute stroke. Determinants of penumbral tissue fate, such as age, hyperglycemia, hematocrit, and oxygen concentration, are increasingly being recognized using neuroimaging. The significance of the penumbra in the white matter and in posterior circulation stroke is also becoming clearer. Neuroimaging is also making invaluable contributions to clinical decision making in acute stroke, especially in relation to reperfusion therapies in the 3- to 6-hour time window. Despite ongoing questions over the choice of parameters to identify the penumbra and their respective clinical usefulness, imaging is gaining widespread use in acute stroke management. However, definitive evidence of its benefit is still lacking. This review explores the recent progress and controversies relating to imaging of the penumbra.

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  1. Department of Clinical Neurosciences, Addenbrooke’s Hospital, Hills Road, Box 93, CB2 2QQ, Cambridge, United Kingdom

    Jean-Claude Baron MD, FRCP, FMedSci

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  1. Ramez R. Moustafa MSc, MRCP
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Correspondence to Jean-Claude Baron MD, FRCP, FMedSci.

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Moustafa, R.R., Baron, JC. Imaging the penumbra in acute stroke. Curr Atheroscler Rep 8, 281–289 (2006). https://doi.org/10.1007/s11883-006-0005-0

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