An intravascular catheter including a reinforcement layer having a plurality of interwoven metal wire members and polymer members. Its deactivation occurs upon reaching a predefined release condition. The machine control is returned to the first software, which calculates the difference between the angle of the bend actually performed and the angle of the nominal bend and then orders the start of a new bend corresponding to the angular difference, thereby obtaining a bend corresponding to the nominal bend. The input value of the input is stored when the input is determined to be the normal key input. Therefore, the method may set a preference chrominance area in a simple manner, and hardware for setting the preference chrominance area may be easily implemented.