Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exam from ___ . The lungs remain clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . Osseous structures again notable for hypertrophic changes in the spine and prior left lateral rib fractures .
    OUTPUT:
    
No acute cardiopulmonary process .