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Figure 15 Cyrptogenic organising pneumonia (COP) on high resolution (HR) CT imaging: nodules with air bronchograms. (A) Axial HRCT imaging shows a poorly defined nodule with a central air bronchogram (arrow), shown on biopsy to represent COP. (B) Axial HRCT image performed several weeks after (A) showing near complete resolution of the nodule (arrow).
