Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A well - marginated elliptical opacity in the right lower lobe is unchanged since ___ , compatible with a benign process . Lungs are otherwise clear . There is no consolidation to suggest pneumonia , there is no pleural effusion or pneumothorax . Hilar and cardiomediastinal contours are unchanged , with marked tortuosity of the thoracic aorta . No pulmonary vascular congestion or edema . Left pectoral pacer with leads extending to the right atrium and right ventricle is unchanged . Degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No evidence of pneumonia or pulmonary edema . Unchanged right lower lobe nodule , stable since ___ , compatible with a benign process .