Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline enlarged . The aorta is mildly tortuous . There is crowding of the bronchovascular structures due to low lung volumes . No overt pulmonary edema is demonstrated . Patchy opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Low lung volumes with bibasilar airspace opacities likely reflective of atelectasis .