Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear without focal consolidation , effusion , or pneumothorax . Cardiomediastinal silhouette is within normal limits . Median sternotomy wires and prosthetic aortic valve are identified . Atherosclerotic calcifications seen at the aortic arch . Hypertrophic changes are seen in the spine . No definite acute fracture is seen .
    OUTPUT:
    
No acute cardiopulmonary process .