Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postsurgical changes with persistent scarring at the right base are stable from prior exams . A small right pleural effusion is unchanged . There is no left pleural effusion . There is no pneumonia , pulmonary edema , or pneumothorax . The aorta is tortuous and calcified . The cardiomediastinal silhouette is otherwise normal .
    OUTPUT:
    
Stable post-surgical changes in the right lung with a persistent small right pleural effusion . No acute cardiopulmonary process .