DIRECTOR FOR ULTRASHORT WAVE THERAPY INSTRUMENT

PROBLEM TO BE SOLVED: To provide an ultrashort wave therapy instrument embodying a director which satisfies flexibility and has low heat generation.SOLUTION: The director is constituted by covering a sheet coil with a cushion material. The sheet coil is obtained by forming a helical conductive pattern with a width of 2 mm and an in-pattern distance of 1.5-1.8 mm on a film shape insulator with the use of copper foil with a thickness of 70 μm, wherein the wire turns of the conductive pattern is 10-20 μH.