Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided PICC line terminates in the mid-to - lower superior vena cava . The heart is probably at the upper limits of normal size . Trace pleural effusions are suspected based on blunting of posterior costophrenic sulci and slight fullness of lateral sulci . However , the lung fields appear clear . Given technique , cardiac and mediastinal contours are probably within normal limits .
    OUTPUT:
    
Trace suspected pleural effusions . Clear lungs .