Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube and enteric catheter are in appropriate and unchanged position . Lung volumes are low resulting in bronchovascular crowding , though no overt interstitial edema is evident . Aeration of the left lung base has improved . Mild basilar atelectasis likely persists . There is no pneumothorax . Cardiomediastinal contours are within normal limits and unchanged .
    OUTPUT:
    
1 . Standard position of support devices . 2 . Improved aeration of the left lower lobe , though mild probable bibasilar atelectasis persists .