Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . There is a faint subdiaphragmatic lucency on the right , more conspicuous on lateral view , which corresponds with free intraperitoneal air seen on subsequent CT .
    OUTPUT:
    
Findings consistent with pneumoperitoneum . No acute cardiopulmonary process .