Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube terminates 5 cm from the carina . Enteric tube is seen beyond the diaphragm . Right PICC terminates in the region of the upper right atrium . Heterogeneous bilateral parenchymal opacities have slightly improved since the prior study , and there is slightly better aeration . Heart size and mediastinal contours are unchanged .
    OUTPUT:
    
Apparent improvement in moderate pulmonary edema could be due in part to positive pressure ventilator support . Heart normal size . Pleural effusion small if any . No pneumothorax . Stable support lines and tubes .