Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates a normal heart size . The aortic knob is calcified . Cardiac and mediastinal silhouettes are stable , as are the hilar contours . There is no pleural effusion or pneumothorax . No focal consolidation is seen .
    OUTPUT:
    
No acute cardiopulmonary process .