Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2009 Nov;5(4):279–288. doi: 10.2174/157340309789317887

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2009 Bentham Science Publishers Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/), which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Fig. (5). Cerebral perfusion studies: Computed Tomography and Magnetic Resonance Imaging. — Panel A. Cerebral Blood Volume (CBV) demonstrates normal values. Panel B. Prolonged mean transit time (MTT) demonstrates hypoperfusion of the right hemisphere in the middle cerebral artery territory. Comparison of the CBV and MTT images reveals a mismatch, consistent with a region of ischemic penumbra. Panel C. Cerebral angiogram in the same patient showing collateral flow to the right anterior cerebral artery territory through the anterior communicating artery and leptomeningeal collaterals (arrow heads). Panels D, E and F. Example of diffusion weighted images (DWI) and perfusion weighted images (PWI) in a patient with carotid artery occlusion. Note small areas of restricted diffusion in Panel D (acute infarcts-bright signal) compared with a large area of decreased perfusion in Panel E (arrow), demonstrating a region of mismatch (ischemic penumbra). Panel F shows a three dimensional reconstruction of the carotid system based on CT angiography, demonstrating occlusion of the internal carotid artery at the origin (red arrow).