Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views were obtained of the chest . The lungs are somewhat low lung volumes with mild bibasilar atelectasis . Old left - sided rib fractures are seen without new displaced rib fractures . There is no pneumothorax or pleural effusion . The cardiac size is normal with tortuous ascending aortic contour . Mild degenerative changes are seen in the thoracic spine with unchanged mild height loss in the mid upper thoracic vertebral bodies . Hyperdensities projecting in the abdomen on the lateral view are likely external to the patient .
    OUTPUT:
    
Bibasilar atelectasis . Old left sided rib fractures . If there is continued concern for a right sided rib fracture , then a dedicated rib series is recommended .