Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are slightly hyperinflated but clear without focal consolidation , effusion , or edema . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications noted at the aortic arch and there is slight tortuosity of the descending thoracic aorta . Thoraco lumbar posterior fixation hardware is partially visualized .
    OUTPUT:
    
No definite acute cardiopulmonary process .