Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube has migrated distally , and now terminates 2 .5 cm above the carina . Nasogastric tube terminates in the stomach . There is no pneumothorax . Moderate right and small left pleural effusions persist . Continued hazy bibasilar opacities , right greater than left . Central venous congestion and mild interstitial edema have improved . Mild cardiomegaly is unchanged . The aorta is tortuous and calcified .
    OUTPUT:
    
1 . Slight improvement in pulmonary edema . 2 . Persistent bibasilar opacities , better characterized on prior CT .