Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates persistent mild bilateral interstitial opacities consistent with pulmonary edema , which has not significantly changed from the prior study . The mediastinum remains enlarged with prominence of the main pulmonary artery . There are stable - appearing moderate bibasilar pleural effusions . There is stable - appearing severe cardiomegaly . There is no pneumothorax .
    OUTPUT:
    
Persistent interstitial opacities consistent with ongoing moderate - to - severe pulmonary edema , without significant change . Additionally , there are persistent moderate - sized bibasilar pleural effusions , not significantly changed .