Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , the left basal atelectasis has likely slightly decreased . The small right - sided effusion and right middle / lower lobe atelectasis have not significantly changed . No interstitial edema . No pneumothorax .
    OUTPUT:
    
Right effusion , and middle / lower lobe atelectasis are stable . Slight decrease in left atelectasis .