Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single semi supine portable AP radiograph through the lungs demonstrates bibasilar patchy opacities . Heart size is unchanged when compared to prior study dated ___ . Allowing for differences in patient position , mediastinal and hilar contours are stable in appearance . Patient is status post endotracheal tube placement its tip which appears 7 cm above the level of the carina . For more appropriate placement , endotracheal tube should be advanced 2 cm . There is no large pleural effusion . There is no pneumothorax . Mild basilar atelectasis .
    OUTPUT:
    
Bibasilar patchy opacities are likely due to atelectasis or aspiration . Endotracheal tube should be advanced 2 cm for more appropriate position .