Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , without focal consolidation to suggest pneumonia . There is no pleural effusion or pneumothorax . Heart size is enlarged , slightly increased from prior study . The mediastinal silhouette is within normal limits but again with a slightly tortuous aorta . Degenerative changes of thoracic spine are again noted .
    OUTPUT:
    
No acute cardiopulmonary process .