To provide technologies for clearly displaying the result of measurement of the shape of a bone.

A bone shape image 520 visually expresses the bending state of the bone according to the bending angle. The bone image 522 in the bone shape image 520 expresses the bending bone by connecting two cylindrical display modes on one end side in the axial direction of each display mode. The bending angle θ is expressed by the connection angle of the two cylindrical display modes. Subordinate array markers 524 are also displayed in the bone shape image 520. Each subordinate array marker 524 expresses the position (the position in the axial direction of the bone) of a vibration element by daubing the part corresponding to the driven vibration element.

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