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Subacute clot mimicking flow in a thrombosed arterial bypass graft on two‐dimensional time‐of‐flight and three‐dimensional contrast‐enhanced MRA
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Subacute clot mimicking flow in a thrombosed arterial bypass graft on two‐dimensional time‐of‐flight and three‐dimensional contrast‐enhanced MRA

Erik K Insko, Evan S Siegelman and Alan H Stolpen
Journal of magnetic resonance imaging, Vol.11(2), pp.192-194
02/2000
DOI: 10.1002/(SICI)1522-2586(200002)11:2<192::AID-JMRI17>3.0.CO;2-1
PMID: 10713953

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Abstract

Subacute intravascular thrombus can contain methemoglobin, which results in very short spin‐lattice (T1) relaxation times. We describe a case of a 78‐year‐old man with increasing right lower extremity claudication. The patient had a thrombosed arterial bypass graft showing high signal intensity that mimicked flow on both two‐dimensional time‐of‐flight and three‐dimensional contrast‐enhanced MR angiography. Misinterpretation of the high signal thrombus as flowing blood can be avoided by obtaining a precontrast T1‐weighted sequence. J. Magn. Reson. Imaging 2000;11:192–194. © 2000 Wiley‐Liss, Inc.
time‐of‐flight methemoglobin bypass graft thrombus MRA

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