Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates in the SVC . Heart size is normal . Mediastinal and hilar contours are unremarkable . Multiple clips are again demonstrated within the superior mediastinum and lower neck compatible with prior thyroidectomy . Linear and patchy opacities within both lung bases is partially attributable to subsegmental atelectasis in the right middle lobe , but infection can not be completely excluded elsewhere in the lung bases . There is no pleural effusion or pneumothorax . No acute osseous abnormalities are demonstrated .
    OUTPUT:
    
Streaky bibasilar airspace opacities , partially attributable to subsegmental atelectasis , though infection can not be completely excluded .