Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC terminates at the superior cavoatrial junction . Lung volumes are low , there is continued left lower lobe opacity with partial silhouetting of the hemidiaphragm , corresponding to atelectasis on prior CT . Small left pleural effusion is also present . The right lung is clear . Heart size is normal . Old healed right anterior second through fourth rib deformities .
    OUTPUT:
    
Unchanged left lower lobe atelectasis and small effusion .