Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta remains tortuous and demonstrates atherosclerotic calcifications at the knob . There are low lung volumes with crowding of the bronchovascular structures . Patchy bibasilar airspace opacities may reflect atelectasis , but infection or aspiration can not be excluded . No large pleural effusion or pneumothorax is seen , but the right costophrenic angle is excluded from the field of view . No acutely displaced fractures are evident . Remote compression deformity of a mid thoracic vertebral body is unchanged .
    OUTPUT:
    
Low lung volumes with patchy bibasilar airspace opacities . This may reflect atelectasis but infection or aspiration can not be completely excluded .