Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of top normal size , similar to prior , with normal cardiomediastinal borders . The vascular pedicle and mediastinum are not widened . The lungs are clear without focal or diffuse abnormality . No pleural effusion or pneumothorax . Osseous structures are unremarkable . A new electronic device overlying the left hemithorax is compatible with a vagal nerve stimulator . Surgical clips overlie the right thyroid bed .
    OUTPUT:
    
No acute cardiopulmonary process .