Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to ___ chest radiograph , the 11 mm focal nodular opacity in the right lower hemithorax is unchanged from both ___ and ___ chest radiographs . This nodular opacity is not seen on lateral view and is likely external to the the intrathoracic cavity and of no clinical significance . Lungs are otherwise well - expanded and clear . No effusions nor pneumothorax . Cardiomediastinal and hilar contour are normal .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia . No acute cardiopulmonary abnormality . 2 . Stable 11 mm right lower hemithorax nodular opacity of no clinical significance .