Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are within normal limits . The aorta is minimally tortuous . Streaky opacities at the lung bases likely reflect atelectasis . No pneumothorax or pleural effusion . Minimal scarring at the apices .
    OUTPUT:
    
Streaky opacities at the lung bases most likely represent atelectasis . Cardiomediastinal and hilar contours are within normal limits .