Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The heart size is top normal , not significantly changed . There are no pleural effusions . No pneumothorax is seen . Elevation of the right hemidiaphragm is unchanged . Multiple bilateral rib fractures are redemonstrated , in various stages of healing . There is no definite acute rib fracture .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Multiple bilateral rib fractures in various stages of healing , as seen on the prior radiograph from ___ . Evaluation for an acute rib fracture would require radiographs targeted to patient 's site of focal pain .