Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates an endotracheal tube , its tip appears to project into the right mainstem bronchus . An enteric tube descends these thorax an uncomplicated course , it s tip below the left hemidiaphragm . Cardiomediastinal and hilar contours are within normal limits . Lung volumes are low with resultant central vascular crowding and bibasilar atelectasis . There is no right pleural effusion . Blunting of the left costophrenic angle may reflect pleural thickening . No focal opacity convincing for pneumonia is seen . There is no air under the right hemidiaphragm . There is no pneumothorax .
    OUTPUT:
    
Endotracheal tube positioned within the right mainstem bronchus for which repositioning is advised .