Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal . Mild bibasilar atelectasis is present . There is no focal consolidation , pleural effusion or pneumothorax . No acute osseous abnormalities are detected .
    OUTPUT:
    
Mild bibasilar atelectasis .