Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar regions of consolidation are noted . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . There is no free intraperitoneal air . Degenerative changes are noted at the shoulders , left more so than right .
    OUTPUT:
    
Bibasilar regions of consolidation likely atelectasis , infection not excluded . No free intraperitoneal air .