Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are hyperexpanded with flattening of the diaphragm , compatible with COPD . Bibasilar atelectasis is noted . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The heart size is difficult to assess due to bibasilar atelectasis , but appears unchanged since prior exam . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . Hyperexpanded lungs with flattening of the diaphragm , compatible with COPD . 2 . No evidence of focal consolidation to suggest pneumonia .