Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment of the lung bases is limited due to poor penetration . The cardiac , mediastinal and hilar contours are unchanged , with the heart size appearing top normal . No focal consolidation , large pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
Limited study but no acute cardiopulmonary abnormality .