Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest are obtained . Stable scarring at the right lung base is again noted . Old right rib cage deformity is seen . No evidence of pneumonia or aspiration . Cardiomediastinal silhouette appears normal . Bony structures appear intact . Old right rib cage deformity is unchanged .
    OUTPUT:
    
No acute intrathoracic process , specifically no signs of aspiration .