A pair of gardening shears include a blade fastened to one end of a first handle, and a fixed jaw plate fastened to one end of a second handle which is pivotally fastened to the first handle by a pivoting member. When the number of incoming calls does not exceed a threshold and the number of movements between the first area and the second area exceeds a threshold, a mobile switchboard combines the first area and the second area into an extended area, and informs the mobile unit of the extended area. The wavelength of incoming light 101 input from one end 13a of the optical waveguide 13 is converted and outgoing light 102 is output from the other end 13b of the optical waveguide 13. At least a portion of the handle may have a multi-wall configuration defined by a gap. The adjustment mechanism is operable to provide the mechanical adjustability of the band. A reconstructing calculation is carried out for the object based on the three-dimensional position information on the X-ray tube and area detector relative to the calibration phantom, to create slice images or three-dimensional volume data of a selected site of the object.