Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear and hyperexpanded with flattened diaphragms suggestive of chronic obstructive pulmonary disease . The mediastinal silhouette , hila , and cardiac borders are normal . No pleural effusion . Stable focal right hemidiaphragm eventration . A left chest wall defibrillator with intact dual leads terminating in the right atrium and right ventricular wall is unchanged from ___ . Wedge compression deformities in 2 thoracic vertebrae are stable from ___ .
    OUTPUT:
    
1 . Unchanged left chest wall defibrillator . 2 . Chronic obstructive pulmonary disease .