Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , portable upright . There is bilateral lower lobe atelectasis . The lungs are otherwise clear . Mild pulmonary vascular congestion is present with minimal interstitial edema . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion and mild interstitial edema . 2 . Bibasilar atelectasis .