Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The lungs are well expanded and clear . A patchy new left basilar opacity suggests atelectasis but is not specific . A left chest Port - A - Cath tip terminates at the cavoatrial junction . The cardiac and mediastinal contours are normal . Right third and fourth rib fractures were already present before .
    OUTPUT:
    
Patchy new left basilar opacity , probably atelectasis but not specific .