Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates within the low SVC . Heart size is normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Small left pleural effusion is noted , with streaky bibasilar airspace opacities which appear slightly progressed compared to the prior exam . No pneumothorax is identified . Multilevel degenerative changes are noted in the thoracic spine . Clips are seen within the midline upper abdomen .
    OUTPUT:
    
Streaky bibasilar airspace opacities , slightly progressed in the interval , could reflect atelectasis or infection with a trace left pleural effusion .