Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube terminates 4 .3 cm above the carina . Nasogastric tube is in stomach . There is moderate cardiomegaly . The aortic arch is heavily calcified . There is increased aeration at the lung bases bilaterally although the left hemidiaphragm remains obscured . Opacification along the minor fissure persists . There is persistent heterogeneous opacification of the right upper lobe .
    OUTPUT:
    
1 . Overall , there is improved aeration of the lungs as compared to the prior study . Specifically , there is substantial improvement in right middle lobe and marginal improvement in right upper lobe opacities . 2 . Appropriate positioning of lines and tubes .