Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain hyperinflated with flattening of the diaphragms and relative lucency of the upper lobes , consistent with chronic obstructive pulmonary disease with pulmonary emphysema . There is persistent right base opacity similar as compared to the prior study , though slightly increased as compared to ___ . Findings could be due to underlying pneumonia or aspiration . No large pleural effusion is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are grossly stable . Old bilateral rib fractures are again seen .
    OUTPUT:
    
1 . COPD with pulmonary emphysema . 2 . Right base opacity appears slightly increased . Findings may be due to progression of pneumonia ; however , underlying pulmonary lesion is not excluded , particularly given underlying COPD . Recommend followup to resolution , consider nonurgent chest CT given background of COPD .