Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is mildly enlarged . The aorta is slightly tortuous and demonstrates diffuse calcifications . Patchy opacities in the lung bases likely reflect atelectasis . Aspiration or infection can not be fully excluded . There is no pulmonary edema . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy bibasilar airspace opacities likely reflecting atelectasis though infection or aspiration can not be excluded .