Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube is in appropriate position with gastric tube ends in the stomach . The left subclavian central venous line ends in the lower SVC . Low lung volumes continue with improvement in previous bibasilar opacity and interstitial edema since ___ . The cardiac silhouette continues to be mildly enlarged .
    OUTPUT:
    
Continued improvement of bibasilar opacity and interstitial edema since ___ .