Patients with uncomplicated painful bone metastases were randomized ( @:@:@ ) and blinded to receive either @Gy in a single fraction with conventionally planned radiotherapy ( arm A ) or @Gy in a single fraction with DPBN ( dose range between @Gy and @Gy ) ( arm B ) or @Gy in a single fraction with DPBN ( dose range between @Gy and @Gy ) ( arm C ) .