Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax , although the left costophrenic angle is not included on the frontal view . A band - like posterior opacity in the lower lobe is most consistent with atelectasis or scarring . There is no definite pleural effusion or pneumothorax . The bones appear demineralized , limiting visualization . An irregular appearance to the right posterolateral eighth rib was not present before suggesting a new fracture .
    OUTPUT:
    
Right - sided eighth rib fracture without displacement . No evidence of acute disease .