Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate mild atelectasis at the right base . The cardiomediastinal and hilar contours are unremarkable . There is no pneumothorax , pleural effusion , or consolidation . Old healed right rib fracture .
    OUTPUT:
    
No acute cardiopulmonary process .