Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph was provided . The lungs appear clear without focal consolidation , effusion or signs of pulmonary edema . No pneumothorax is present . The heart appears within normal limits of size . The mediastinal contour is normal . The imaged osseous structures appear intact . There is no free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .