Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs demonstrate bibasilar atelectasis . No focal consolidation is seen . Calcified aorta is again seen as are multiple prior rib fractures on the right . No pleural effusion or pneumothorax . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Bibasilar atelectasis without definite pneumonia .