Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided PICC line is in unchanged position . Right midzone wedge - shaped opacity is identified anteriorly within unchanged air-fluid level . There are mild bilateral fluffy interstitial changes . This is unchanged from before with relative preservation of the left base . No pneumothorax .
    OUTPUT:
    
Little interval change from the previous day . Air-fluid level in the right mid zone at the site of a prior surgery .