Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Deformities from prior fractures of the right fourth through ninth ribs are again noted . Hyperexpansion and flattened hemidiaphragms suggest COPD . There is no focal consolidation , pleural effusion or pneumothorax . Pleural parenchymal scarring in the lung apices is unchanged . The cardiomediastinal silhouette is within normal limits . There is a linear atelectasis at the left lung base .
    OUTPUT:
    
No acute cardiopulmonary abnormality .