No person shall operate or maintain any X-ray fluoroscope, or other equipment or apparatus employing roentgen rays, in the fitting of shoes or other footwear or in the viewing of bones in the feet. This section shall not apply to any licensed physician and surgeon, podiatrist, chiropractor, or any person practicing a licensed healing art, or any technician working under the direct and immediate supervision of those persons. Any person violating this section shall be guilty of a misdemeanor.