Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable supine chest radiograph was provided . Lung volumes are low . There is no focal consolidation , pleural effusion , or pneumothorax . A left chest wall pacemaker with a single lead in the right ventricle is present . Cardiomediastinal silhouette appears slightly enlarged . The bones are intact . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .