Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Heart size is normal . There is mild central pulmonary vascular congestion but no interstitial edema . No pleural effusion . No pneumothorax . Osseous structures appear intact .
    OUTPUT:
    
1 . Mild central vascular congestion without interstitial edema or pleural effusions . 2 . No evidence of pneumonia .