Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with no pleural effusion identified . Cardiomediastinal contour appears stable when compared to prior study dated ___ . Intact median sternotomy wires are identified . Calcifications are noted within the aortic arch . No acute osseous abnormality is identified .
    OUTPUT:
    
No opacity convincing for pneumonia is identified .