Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous . Mediastinal and hilar contours are similar . There is crowding of bronchovascular structures without overt pulmonary edema . Patchy opacities are noted in the left lung base could reflect atelectasis , but infection is not excluded in the correct clinical setting . No pleural effusion or pneumothorax is present . There are mild degenerative changes seen in the thoracic spine . Multiple remote left - sided rib fractures are again noted .
    OUTPUT:
    
Left basilar patchy opacity may reflect atelectasis though infection is not excluded in the correct clinical setting .