Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . This accentuates the size of the cardiac silhouette which appears mild to moderately enlarged . The mediastinal and hilar contours are unchanged with atherosclerotic calcifications again noted at the aortic knob . Pulmonary vasculature is normal . Calcified granulomas are seen within both upper lobes . Linear opacity in the left lung base likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Degenerative changes are seen within the upper lumbar spine . Cholecystectomy clips are demonstrated in the right upper quadrant of the abdomen .
    OUTPUT:
    
Left basilar atelectasis .