Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable . Patchy opacities are demonstrated within both lung bases , which appear somewhat progressed compared to the previous exam . This could reflect areas of infection and / or atelectasis . No large pleural effusion or pneumothorax is demonstrated though the left costophrenic angle is excluded from the field of view . No pulmonary edema is seen . There are no acute osseous abnormalities . Right PICC has been removed .
    OUTPUT:
    
Patchy bibasilar airspace opacities are progressed in the interval , and may reflect infection or worsening atelectasis .