Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal in size with a left ventricular predominance but unchanged . The aorta remains tortuous . Pulmonary vascularity is normal . There are minimal linear and streaky opacities in the lung bases compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis .