Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . There is mild interstitial thickening , overall stable compared to the exam from ___ . No focal consolidations concerning for pneumonia is identified . Atherosclerotic calcifications are again noted at the aortic arch . The visualized osseous structures appear unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormalities identified .