Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline in size . There is moderate unfolding and calcification along the thoracic aorta . Streaky retrocardiac opacities , probably refering to the left lower lobe , obscure the contour of the left hemidiaphragm . Elsewhere , the lungs appear clear . There are no pleural effusions or pneumothorax . Small anterior osteophytes are present throughout the thoracic spine .
    OUTPUT:
    
Streaky basilar opacities , more suggestive of atelectasis than infection . If pulmonary symptoms concerning for pneumonia are present , however , then short - term follow - up radiographs may be helpful . Developing infection is not excluded .