Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrates a right chest wall pacemaker with unchanged position of leads . The mid thoracic compression fracture appears stable . The lungs are clear with no nodules . Increased AP diameter along with diaphragmatic flattening and vascular deficiency in the apices is consistent with chronic emphysema . The heart , mediastinal and hilar contours are unchanged . No pleural abnormality is identified .
    OUTPUT:
    
No evidence of intrathoracic malignancy .