Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath terminates near the superior cavoatrial junction . There is a faint opacity at the right lung base , probably atelectasis . No other consolidation . No effusion or pneumothorax . Cardiomediastinal contours are normal . The catheter projecting over the mid abdomen presents patient 's PTBD catheter .
    OUTPUT:
    
Mild right basal atelectasis , less likely pneumonia .