Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . There is stable mild cardiomegaly but the cardiomediastinal and hilar contours are unremarkable otherwise . There is no pleural effusion or pneumothorax . A pacemaker generator is noted in the left axillary region with the leads ending in expected positions in the right atrium and right ventricle .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .