on 34 position to arm the infrared receiver 10 and may be manipulated into the 34 test 34 position to test the head operated fluoroscopic control without activating the fluoroscope 28 the unit is rendered inoperative by placing the 3 position switch in the middle or 34 off 34 position referring now to fig5 7 of the drawings in alternative preferred embodiments of the invention the emitter cartridge 2 of the infrared transmitter 1 can be removably attached by means of a cartridge clip 2a to the headband 22 fig5 or the head cover 27 fig6 under circumstances where the physician does not wear eyeglasses furthermore referring to fig7 in another alternative preferred embodiment of the invention the emitter cartridge 2 can be inserted into one of several band clamps 41 spaced on the cartridge band 40 for the same purpose referring now to fig1 8 and 9 of the drawings a typical control cabinet 32 and cooperating circuits for operating the fluoroscope 28 as well as the infrared transmitter 1 and infrared receiver 10 are illustrated the transmitter circuit 4 illustrated in fig8 includes an oscillator 5 electrically connected to a driver 6 which drives an infrared light emitting diode 7 to produce infrared radiation 8 similarly the receiver circuit 20 illustrated in fig9 includes a sensor 13 which receives and senses the infrared radiation 8 a pre amplifier 14 electrically connected to the sensor 13 a filter 15 electrically connected to the pre amplifier 14 and a decoder 16 electrically connected to the filter 15 and to a relay 17 the relay 17 energizes the fluoroscopic x ray.