Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . No large pleural effusion , or pneumothorax is seen . The cardiac silhouette is not enlarged . The mediastinal and hilar contours are unremarkable and stable since the prior chest radiograph of ___ . No displaced fracture is seen .
    OUTPUT:
    
No acute cardiopulmonary process .