PURPOSE: An X-ray irradiation range control method and a device thereof are provided to control a collimator according to a received user input, and to control the range of X-ray irradiation according to the size and position of the collimator.CONSTITUTION: An X-ray irradiation range control method comprises the steps of: displaying (110) an image of a photographed object receiving (120) a user input of a displayed-photographed image controlling (130) a collimator according to the received user input and detecting (140) the intensity of an X-ray for the photographed image.COPYRIGHT KIPO 2013[Reference numerals] (110) Displaying an image of a photographed object (120) Receiving a user input of a displayed-photographed image (130) Controlling a collimator according to the received user input (140) Detecting the intensity of an X-ray for the photographed image (AA) Start (BB) End대상체가 촬영된 영상을 디스플레이하고, 디스플레이된 촬영 영상에 대한 사용자 입력을 수신하며, 그리고 수신된 사용자 입력에 따라 콜리메이터(collimator)를 제어하고, 콜리메이터의 크기 및 위치에 따라 엑스레이 조사 범위가 조절되는 엑스레이 조사 범위 조절 방법이 개시된다.
