Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph is obtained . There is no free air below the right hemidiaphragm . Lungs are clear . Cardiomediastinal silhouette appears stable . Bony structures appear intact .
    OUTPUT:
    
No evidence of free air below the right hemidiaphragm . No acute intrathoracic process .