Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is moderately enlarged . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Streaky opacities in the lung bases likely reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . Numerous remote bilateral rib fractures are demonstrated . Acute fracture of the right fourth posterior rib is noted . There are multilevel mild degenerative changes seen in the imaged thoracolumbar spine .
    OUTPUT:
    
Bibasilar atelectasis . Acute , mildly displaced right fourth rib fracture . Numerous remote bilateral rib fractures . This was discussed with Dr . ___ at 3 : 40 pm , ___ .