Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since 1 day prior , there has been substantial improvement in pulmonary edema , moderate at the right apex and mild elsewhere . Severe cardiomegaly is unchanged . The left costophrenic angle is not visualized , but there is no right pleural effusion . No pneumothorax . Substantial retrocardiac atelectasis is unchanged . An ET tube terminates 5 .3 cm above the carina . A right - sided IJ Swan - Ganz catheter terminates in the proximal right pulmonary artery . An enteric tube passes into the stomach .
    OUTPUT:
    
Substantially improved pulmonary edema , most pronounced in the right apex .