Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the interim since the most recent prior examination , the ET tube is approximately 6 cm above the carina and may be advanced approximately ___-15 mm . The nasogastric tube is noted with side port in the expected region of the stomach . The previously noted opacification in the left upper lung is noted to be clearing compared to the most recent prior examination . Cardiac silhouette is within normal limits . There is no evidence of pleural effusion or pneumothorax .
    OUTPUT:
    
Diffuse left lung opacity is noted to be clearing compared to the most recent prior examination . ET tube terminates 6 cm above the carina and may be advanced by about 1 - 1 .5 cm .