Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interval placement of an endotracheal tube terminating approximately 4 .9 cm above the carina . A Swan - Ganz catheter terminates in the right main pulmonary artery , unchanged . The left pigtail pleural drain projecting over the left lateral base is also stable in position . Allowing for slightly increased lung volumes and differences in technique heart size has slightly decreased and the central vasculature is less prominent . Mild to moderate pulmonary edema has slightly improved . Small left pleural effusion has decreased . There is no pneumothorax .
    OUTPUT:
    
1 . Interval placement of an endotracheal tube in appropriate position . 2 . Improved mild - to - moderate diffuse pulmonary interstitial edema and decreased small left pleural effusion .