Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly right - sided PICC line is in good position . There is extensive linear atelectasis in the left mid zone . There is a equivocal opacity in the right lower lung zone which might represent a developing infection .
    OUTPUT:
    
PICC line is in good position . Linear changes in the left base probably reflect atelectasis . There is increased opacification of the right base which might represent infection .