Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tip of the ET tube is above the upper margin of the clavicles , no less ___ 8 .5 cm above the carina an should be advanced 3 cm for more secure placement . Right internal jugular line ends at the origin of the SVC . Esophageal drainage tube is traceable to the upper stomach and passes out of view . Mild interstitial edema has improved since ___ . Heart size is normal . There is no pneumothorax .
    OUTPUT:
    
Mild interstitial pulmonary edema has mildly improved .