Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been dramatic improvement in the lungs bilaterally with some residual abnormalities seen in the right mid lung zone . Lungs are well expanded bilaterally with no pleural effusions or pneumothorax . The cardiomediastinal silhouette is stable and within normal limits . There are several areas of focal pleural thickening on the right . Otherwise , pleural surfaces are unremarkable . Minimal stable degenerative changes of the thoracic spine are again noted . There has been interval removal of a left - sided PICC catheter .
    OUTPUT:
    
Substantial but incomplete resolution of COP .