Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A nasogastric tube is seen coursing below the left diaphragm , off the inferior borders of the film . Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . Linear opacities within the left lung base compatible atelectasis . Pulmonary vasculature is normal . No pleural effusion , focal consolidation or pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Left basilar linear atelectasis .