A method of performing bone correction on a computerized tomography image includes the steps of:A. To facilitate reservations of resources by different nodes, a node may transmit a message that requests neighboring nodes to limit their interfering transmissions on a given resource and then transmit another message to inform the neighboring nodes that the node is no longer using the resource. The apparatus includes a structure disposed in the fuel tank and a control unit. The facing edges of the conveying surfaces of these belts are spaced from one another to define a uniform gap between them of a dimension less than that of the disc. Other preferred embodiments include using the above-described character selection method to sequentially enter a series of characters and using a character selection method to enter characters of a predetermined word. At least one of the classification domains is classified ethiologically by cause.