Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . There is mild vascular engorgement of the upper lobes bilaterally , otherwise the hilar and mediastinal contours are normal . The lungs are clear without evidence of focal consolidations concerning for pneumonia . There is no large pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . No acute intrathoracic abnormalities identified . 2 . Mild bilateral upper lobe vascular engorgement , of indeterminate chronicity .