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Fig. 12. —Airway obstruction and stenosis caused by non—small cell lung cancer in 56-year-old woman. Coronal minimal-intensity-projection multiplanar volume reformation image shows complete obstruction of bronchus intermedius (thick arrow) and narrowing of left mainstem bronchus (thin arrows). Although bronchus intermedius obstruction was seen equally well with axial images, length and severity of left mainstem bronchus narrowing were underestimated on axial images (not shown).