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AJNR - American Journal of Neuroradiology

Published ahead of print on November 20, 2008
doi: 10.3174/ajnr.A1388

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Angiography Reveals That Fluid-Attenuated Inversion Recovery Vascular Hyperintensities Are Due to Slow Flow, Not Thrombus

N. Sanossian^a, J.L. Saver^b, J.R. Alger^b, D. Kim^b, G.R. Duckwiler^b, R. Jahan^b, F. Vinuela^b, B. Ovbiagele^b and D.S. Liebeskind^b

^a Stroke Center and Department of Neurology, University of Southern California, Los Angeles, Calif
^b University of California, Los Angeles Stroke Center, Los Angeles, Calif

View larger version (176K): [in this window] [in a new window]   Fig 1. Two cases of retrograde leptomeningeal collateral flow in areas corresponding to FVH. A and B, Case 1: FLAIR demonstrates FVH (arrow) in the Sylvian fissure with an angiogram (B) showing grade 3 collaterals from the ipsilateral ACA. C and D, Case 2: FLAIR (C) demonstrates temporoparietal FVH with ACA-MCA leptomeningeal collaterals on the angiogram (D).

View larger version (119K): [in this window] [in a new window]   Fig 2. A case showing grade 4 collaterals on angiography (A) and FVH (C–E) distal to thrombus, demonstrated as an area of blooming artifact (B).