Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resulting bronchovascular crowding . Mild engorgement of the pulmonary vasculature is new , suggestive early pulmonary edema . Cardiomediastinal hilar contours are unchanged . No pneumothorax or pleural effusion . Mild atelectasis at the bilateral bases has increased slightly over the interval .
    OUTPUT:
    
1 . Mild engorgement of the pulmonary vasculature is new , suggestive of early pulmonary edema . 2 . Mild bibasilar atelectasis has increased slightly over the interval .