Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There no pleural effusions or pneumothorax . Projecting over the lateral left mid lung is a small nodular focus of high density consistent with a calcification , measuring about 5 mm in diameter , consistent with either a parenchymal granuloma or perhaps a bone island within the anterior left fifth rib . Otherwise the lung fields appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .