Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright chest radiograph ___ at 00 : 11 is submitted .
    OUTPUT:
    
Nasogastric tube is seen coursing below the diaphragm with the tip not identified . Linear opacity at the right base persists likely reflecting subsegmental atelectasis . Lung volumes remain diminished . No developing airspace consolidation to suggest pneumonia . No pulmonary edema . Crowding of the pulmonary vasculature . Stable cardiac and mediastinal contours . No pneumothorax .