Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive bilateral parenchymal opacities with intervening air bronchograms are slightly improved in the bilateral lung apices from the most recent prior study . No new opacities or pleural effusions are seen . There is no pneumothorax . The cardiomediastinal contours are within normal limits and unchanged . An endotracheal tube ends approximately 5 cm above the carina at the thoracic inlet . There has been interval placement of a nasogastric tube with the tip in the left upper quadrant , likely in the gastric fundus .
    OUTPUT:
    
1 . Interval improved aeration at the bilateral lung apices with persistent diffuse parenchymal opacities , compatible with ARDS . 2 . NG tube with tip likely in the gastric fundus .