Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart size and cardiomediastinal contours are normal . The right hemidiaphragm is elevated . The lungs are clear without focal consolidation , pleural effusion , or pneumothorax . No acute displaced rib fracture . Contour abnormality of the left posterolateral 4th rib is consistent with a chronic fracture .
    OUTPUT:
    
No acute cardiopulmonary process .