Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is is at the upper limits of normal or slightly enlarged . Cardiomediastinal silhouette and hilar contours are within normal limits . Mild prominence of upper zone vessels may relate to slight the low volumes . No overt CHF or focal infiltrate or consolidation detected . Pleural surfaces are clear without effusion or pneumothorax . No evidence of pneumoperitoneum . Mild thoracic levo convex curvature .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No evidence of pneumoperitoneum .