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 a new veil - like density over the bases of both lungs reflecting new small bilateral pleural effusions . An relative increase in opacification at the left base is either atelectasis or pneumonia . The small amount of right subdiaphragmatic free air is presumably post - procedural . There is no pneumothorax . The heart is normal in size . Hilar and mediastinal contours are normal .
    OUTPUT:
    
1 . New small bilateral pleural effusions . 2 . Interval increase in left basal atelectasis or pneumonia . 3 . Subdiaphragmatic gas under the right hemidiaphragm , likely post - procedural . Findings were discussed with Dr . ___ at 9 : 24 a .m . by Dr . ___ by telephone on ___ .