Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . 5 mm calcified nodule projecting over the left upper lobe likely reflects a granuloma . Streaky opacities in the lung bases likely reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Mild bibasilar atelectasis .