Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Heart size is top normal . There are no pleural effusions or pneumothorax . Multiple bilateral rib fractures , most , if not all , healed are new since ___ , as is a compression fracture of the L1 vertebral body , seen on the lateral view .
    OUTPUT:
    
No acute process .