Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to study from six hours prior , there has been interval improvement in interstitial edema . Otherwise , there is no significant change with persistently low lung volumes , bilateral left greater than right effusions , bibasilar atelectasis with unchanged wide mediastinal contour from known thyroid carcinoma , and unchanged positioning of endotracheal tube .
    OUTPUT:
    
Interval improvement of interstitial edema , otherwise without significant change from exam six hours prior .