Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable with atherosclerotic calcifications noted diffusely within the aorta . Pulmonary vasculature is normal . Small right pleural effusion is noted with adjacent streaky opacity , possibly reflective of atelectasis though infection is not excluded . Left lung is clear . Multilevel degenerative changes are seen within the thoracic spine .
    OUTPUT:
    
Small right pleural effusion with adjacent right basilar streaky opacity , likely atelectasis though infection can not be completely excluded .