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Example of UTE images, RBC:M maps, 129Xe ventilation images, and maps of pulmonary blood flow at visit 1 and visit 2, for each patient. The white arrow indicates a segmental perfusion defect visible at visit 1, which improves at visit 2. M = membrane; PBF = pulmonary blood flow; RBC:M = RBC to membrane fraction; UTE = ultra-short echo time.
