Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . Projecting over the right upper lung is a questionable nodular opacity , a possible lung nodule . Elsewhere , the lungs appear clear . No pleural effusion or pneumothorax . Moderate degenerative changes are present along the mid thoracic levels .
    OUTPUT:
    
No evidence of acute disease . Equivocal finding in the right upper lobe , namely a possible nodule . Chest CT is suggested to investigate further when clinically appropriate unless prior radiographs are available to show long - term stability of this appearance .