Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior exam there is now mild interstitial edema with asymmetric opacity along the right heart border in the right middle lobe . The heart size is stably mildly enlarged . There is increased opacity at the left base consistent with atelectasis .
    OUTPUT:
    
1 . Mild interstitial edema . 2 . Atelectasis in the right middle lobe and left lower lobe .