Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . There is mild unfolding of the thoracic aorta . The mediastinal and hilar contours are otherwise unremarkable . There are streaky opacities in the lingula and both lower lobes , most suggestive of atelectasis in the setting of low lung volumes . There is no pleural effusion or pneumothorax . Slight degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
Low lung volumes and streaky basilar opacities most suggestive of minor atelectasis .