Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is in adequate position at 5 .4 cm above the carina . The left subclavian line ends in the brachiocephalic vein and is unchanged . The severe bilateral diffuse alveolar opacities are better today . There is no visible pneumothorax or pleural effusion . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
The severe diffuse bilateral alveolar opacities are better today . The evolution and radiologic appearance is more compatible with ARDS . Superimposed infection or edema can not be excluded .