Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , pulmonary edema has significantly improved , now right greater than left and mild to moderate overall . Retrocardiac opacification and opacification in the right mid to lower lung have minimally improved and likely reflect atelectasis , though aspiration or infection can not be excluded . Small right pleural effusion persist . Trace , if any , effusion on the left . No new focal consolidation . No pneumothorax . Mild central vascular congestion without overt pulmonary edema . Moderate cardiomegaly is stable . Cardiopulmonary support devices are in unchanged standard placement .
    OUTPUT:
    
1 . Interval improvement of alveolar pulmonary edema , now right greater than left and overall mild to moderate . 2 . Mildly improved retrocardiac opacification and right middle and lower lung opacification , reflecting atelectasis , though infection or aspiration can not be excluded . 3 . Persistent small effusion on the right . Trace , if any , effusion on left . 4 . Stable moderate cardiomegaly . Mild central vascular congestion without overt pulmonary edema .