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Three-dimensional, contrast-enhanced, high-resolution magnetic resonance angiography (MRA) of the pulmonary vasculature in a 55-year-old patient (A, B) revealing large thromboembolic clots in the central pulmonary artery tree on both sides (arrows). Using time-resolved MRA perfusion techniques and acquiring one data set every 1.1 seconds, significant perfusion defects in the upper left and right lower lobe become visible (C, arrowheads). Used with permission from K. Nikolaou, Ludwig-Maximilians-University, Munich, Germany. Source: MAGNETIC RESONANCE IMAGING AND COMPUTED TOMOGRAPHY OF THE VASCULAR SYSTEM, Hurst's The Heart, 14e Citation: Fuster V, Harrington RA, Narula J, Eapen ZJ. Hurst's The Heart, 14e; 2017 Available at: http://mhmedical.com/ Accessed: May 02, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved