Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study there has been some interval improvement in the pulmonary edema . However there continues to be pulmonary vascular redistribution . And volume loss / infiltrate the left lower lobe . The tracheostomy tube a .m . left - sided PICC line are unchanged .
    OUTPUT:
    
Slight improvement in pulmonary edema