Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear of focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications noted at the aortic arch . Left chest wall single lead pacing device is identified . Degenerative changes in the spine without acute osseous abnormality .
    OUTPUT:
    
No acute cardiopulmonary process .