Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable chest radiograph obtained . Lung volumes are low , though there is no definite consolidation , or supine evidence of effusion or pneumothorax . The heart and mediastinal contours are grossly unremarkable . The bony structures appear intact . Moderate gaseous distention of the stomach is noted .
    OUTPUT:
    
No acute abnormality .