Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided infusion port catheter with the tip at the cavoatrial junction , similar in appearance . Interval improvement of the left basal opacity with residual surgical suture along the left hemidiaphragm . No pneumothorax . The heart size is not enlarged .
    OUTPUT:
    
Left - sided port with the tip at the cavoatrial junction , similar in appearance . Interval improvement of the left basal opacity with residual surgical suture seen along the left hemidiaphragm .