Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear , however the inferior most aspects of the costophrenic sulci are omitted from view on the frontal projection . There is no large pleural effusion or pneumothorax . Heart size is normal . The mediastinal and hilar contours are normal .
    OUTPUT:
    
No acute cardiopulmonary abnormality .