Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is limited due to patient rotation and exclusion of the extreme costophrenic angles . Allowing for this , the cardiac silhouette size remains mildly enlarged . The aorta appears ectatic . No pulmonary vascular congestion is noted . There may be patchy bibasilar opacities suggestive of atelectasis , though infection can not be excluded . No pneumothorax is seen . Multilevel degenerative changes of the thoracic spine are present , though evaluation for a fracture is limited .
    OUTPUT:
    
Limited exam . Probable bibasilar atelectasis , though infection can not be excluded . Evaluation for a thoracic spine fracture is limited on this study .