Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates stable cardiomediastinal and hilar contours . A right upper lobe nodule is noted which has been present on prior examinations and decreased over time consistent with a postinflammatory nodule . There is no pleural effusion . No pneumothorax . Osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .