Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated as on prior . Increased interstitial markings seen throughout the lungs predominantly in the lower lung distribution . Irregularity of the interstitial markings elsewhere is compatible with underlying changes of known COPD . There is no large effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Findings compatible with COPD with superimposed acute bilateral process predominantly in the lower lungs , potentially edema or atypical infection .