Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . There are streaky basilar opacities most suggestive of minor atelectasis ; otherwise the lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .