Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated , similar to prior . There is no focal consolidation . No pleural effusion or pneumothorax is seen . An opacity in the right lower hemithorax is unchanged since ___ , suggestion benign etiology . The cardiac and mediastinal silhouettes are unremarkable . There are stable degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .