Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A nasogastric tube terminates in the gastric antrum . The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is mild volume loss at the left lung base with elevation of the left hemidiaphragm and streaky lingular opacity associated with volume loss . Elsewhere , however , the lungs appear clear . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Findings consistent with left basilar atelectasis ; otherwise unremarkable study .