Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube is 3 .1 cm the carina . Enteric tube courses to at least the level of the GE junction and then beyond the field of view . Left subclavian central venous catheter is in the mid SVC . There is no pneumothorax . Lung volumes are low with significant bibasilar atelectasis especially at the left lower lobe . Right basilar opacification is slightly improved . Moderate cardiomegaly is unchanged . Mild pulmonary edema is improved .
    OUTPUT:
    
1 . Persistently low lung volumes with bibasilar atelectasis , left greater than right . 2 . Right basilar opacity which could reflect aspiration or pneumonia has shown interval improvement . 3 . Mild pulmonary edema is improved .