Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resultant bronchovascular crowding . Clearing of the right base is consistent with decrease in size of the pleural effusion and improved aeration . Persistent retrocardiac opacity corresponds to atelectasis and probable left pleural effusion . There is moderate pulmonary edema . Cardiomediastinal and hilar contours are unchanged . Monitoring and support devices are in the appropriate position .
    OUTPUT:
    
1 . Moderate pulmonary edema . 2 . Stable retrocardiac opacity , consistent with small pleural effusion and atelectasis .