Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . The lungs are clear and well inflated . There is no sign of pneumonia , CHF , effusion , or pneumothorax . The heart and mediastinal contour are normal , though calcification at the aortic arch is noted . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic findings .