Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A 7 mm benign calcification is again seen projecting at the level of the aortic arch . No focal consolidation , pleural effusion or pneumothorax is seen . The heart size is top normal . The hilar and mediastinal contours are unremarkable . The visualized osseous structures are normal .
    OUTPUT:
    
No acute intrathoracic abnormalities identified .