Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta is mildly unfolded . Mediastinal and hilar contours are otherwise unremarkable . Eventration of the right hemidiaphragm is present . The pulmonary vascularity is normal . Minimal bibasilar streaky opacities likely reflect atelectasis . There is no pleural effusion or pneumothorax . Minimal biapical scarring is visualized . There are multilevel degenerative changes in the thoracic spine which are mild .
    OUTPUT:
    
Streaky bibasilar opacities most likely reflect atelectasis . No evidence of mediastinal widening .