This invention relates to radioactively coated devices, preferably radioactively coated medical devices. The device may include a trocar adapted to receive the sheath, the trocar permitting the device to be inserted into the body where no natural passageway exists, the trocar having a side-facing region adapted to maintain registry with the imaging device while the imaging device rotates. Then, the special water-discharge operation is terminated by closing the water discharge valve when a preset duration time passes after a float switch provided at the ice-making water tank detects an ice-making completion water level of the ice-making water in the ice-making water tank after discharge of the ice-making water to outside is started.