Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate several external pacer wires projecting over left hemithorax . The cardiomediastinal silhouette appears normal , allowing for low lung volumes . The lungs remain clear without pneumothorax , vascular congestion , or pleural effusion .
    OUTPUT:
    
No radiographic evidence of acute cardiopulmonary process such as pneumonia .