Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral implanted dual - lead pacer is unchanged in position . Postoperative mediastinum with mild cardiomegaly is unchanged from prior study . Hilar contours are unremarkable . A calcified granuloma in the left mid lung is unchanged from prior examination . Mild interstitial abnormality at the lung bases is chronic . The lungs are otherwise clear . Pleural surfaces are clear without large effusion or pneumothorax . A right humeral head replacement is incompletely imaged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .