Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . Asymmetric elevation of the right hemidiaphragm is stable . Incidental note of azygos fissure . Heart size is top - normal . No pleural effusion or pneumothorax . Nodular opacity on the right at the level of the carina may reflect azygos vein although more prominent than expected . Suggest shallow oblique chest radiograph .
    OUTPUT:
    
No acute pneumonia . Nodular opacity on the right at the level of the carina may reflect azygos vein although more prominent than expected .