Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . The lungs are grossly clear . There is no effusion . The heart is enlarged but stable in configuration . Thoracic aorta is tortuous . Multiple thoracic compression deformities have not definitely changed since prior . Deformity of the sternum is compatible with previously identified sternal fracture .
    OUTPUT:
    
No definite acute cardiopulmonary process .