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Fig. 4A —Mycobacterium avium-intracellulare complex pulmonary disease in 69-year-old woman. High-resolution CT scans obtained at levels of right middle lobar bronchus (A) and inferior pulmonary vein (B) show extensive bronchiectasis, large areas of mosaic perfusion (arrows), and several small centrilobular nodules and cavitating nodules (arrowheads) in both lungs. Total CT score was 23 with scores of bronchiectasis, bronchiolitis, cavity, nodules, volume loss, emphysema, and bullae 6, 7, 4, 1, 1, 2, and 2, respectively. Pulmonary function test results were as follows: forced vital capacity (FVC), 61%; forced expiratory volume in 1 second (FEV₁), 70%; FEV₁/FVC, 81%; peak expiratory flow between 25% and 75% of the forced vital capacity (FEF_25–75%), 56%; total lung capacity (TLC), 91%; and residual volume (RV)/TLC, 60% of predicted value.