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Fig. 3A. —39-year-old man with chronic cough. Axial fat-suppressed gadolinium-enhanced T1-weighted two-dimensional gradient-echo MR image (TR/TE, 149/5.2; flip angle, 70°) shows suspicious signal change mimicking possible cavitary lesion (arrow) in superior segment of right lower lobe. Note moderate phase artifacts across mediastinum and subcarinal lymphadenopathy (star).