A stepped-shape structure applied to an invasive device which is set in an organism. The stepped-shape structure comprises at least two steps which is used to reflect an ultrasound signal to generate an echo signal to produce a localization result according to the echo signal as an ultrasound probe transmits the ultrasound signal to the organism wherein the echo signal includes a wave that specific spectral characteristics can be achieved and utilized for effective detection.一種應用於侵入式裝置之階梯結構,係應用於一用以設置於一生物體之侵入式裝置,用以對侵入式裝置進行定位而產生一定位結果。應用於侵入式裝置之階梯結構包含至少二階層,係用以在一超音波探頭對生物體發射一超音波訊號時,反射超音波訊號而產生一回波訊號,而回波訊號之一頻譜具有一特徵,藉以依據特徵產生定位結果。1‧‧‧應用於侵入式裝置之階梯結構11‧‧‧第一階層12‧‧‧第二階層3‧‧‧超音波探頭S1‧‧‧超音波訊號S2‧‧‧回波訊號d‧‧‧最短距離x‧‧‧階寬y‧‧‧階高
