Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube ends approximately 3 .0 cm above the carina . A nasoenteric tube ends in the stomach . Lung volumes are low , with improvement of a left perihilar and infrahilar opacity . A left basilar opacity persists . Cardiomegaly is increased likely secondary to low lung volumes . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Appropriate positioning of monitoring and support devices . Improved left perihilar opacification , possibly secondary to improving aspiration .