Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: P . A frontal chest radiograph was provided demonstrating no focal consolidation effusion or pneumothorax . The heart size is normal . There is a slightly unfolded thoracic aorta though the mediastinal contour is otherwise unremarkable . Bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .