In order to switch the transmission medium between the Internet and broadcast waves, receptionplayback of communication data received via first media, such as via the Internet from an external device, and broadcast data received via second media, such as via a broadcast network from a broadcast station, is switched. A media format of the VW presentation corresponds to a media format utilized by a target VW. The endoscope mechanisms are then manipulated to orient the distal tip of the device to the desired position for proper cannulation of the duct. The converter is configured to convert, based on validity determination of the 3D conversion instruction, the input image into the 3D image in response to the 3D conversion instruction. The method further performs a Monte Carlo simulation of the radiation source to determine a simulated dose at the plurality of points; and further models the radiation source using the simulated dose and the measured dose.