Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are streaky opacities in the lower lungs , most suggestive of minor atelectasis . Otherwise , the lung fields appear clear . The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . Bony structures are unremarkable . Surgical clips project along the right upper quadrant . There is no free air .
    OUTPUT:
    
Predominantly streaky opacities in the lower lobes , most suggestive of atelectasis . No evidence for free air .