Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal view of the chest . The endotracheal tube ends 5 cm above the carina . The upper enteric tube ends in the stomach . Opacity over the left lung base could represent atelectasis , early infection or scarring . The cardiac and mediastinal contours are normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
The endotracheal tube ends 5 cm above the carina . Opacities in the left lung base could represent atelectasis , early infection or scarring .