The present invention relates to a method for estimating the position of the liver, and more specifically, after obtaining an image of a two-dimensional image through dual energy X-ray absorption spectroscopy, the boundary between the lungs, diaphragm, ribs, and vertebrae is determined. It is about the method of estimating and determining the liver area. A liver position estimation method using a two-dimensional (2D) image of a dual-energy X-ray absorption measurement (DEXA) method according to the present invention comprises: a first step of obtaining a dual energy X-RAY image of the entire body； A second step of generating a bone image using a difference in attenuation of the dual energy X-RAY image generated in the first step； A third step of generating a tissue image from which the bone component is removed by using a difference in attenuation degree of the dual energy X-RAY image generated in the first step； A fourth step of estimating the upper boundary of the liver in the tissue image of the third step； A fifth step of estimating the left boundary of the liver in the bone image of the second step； A sixth step of estimating a lower boundary of the liver in the bone image of the second step； A seventh step of estimating the right boundary of the liver in the bone image of the second step； An eighth step of calculating an outer point of the estimated liver using each boundary image estimated in the fourth to seventh steps； And a ninth step of determining the liver region at the outer point of the estimated liver calculated in the eighth step.본 발명은 간의 위치를 추정하기 위한 방법에 관한 것으로, 더욱 상세하게는 이중 에너지 X선 흡수 계측법을 통해 이차원 이미지를 영상을 획득한 뒤, 폐, 횡경막, 갈비뼈 및 척추뼈의 위치를 통해 간의 경계를 추정하고 간 영역을 확정하는 방법에 관한 것이다. 본 발명에 따른 이중에너지 X선 흡수 계측법(DEXA)의 이차원(2D) 이미지를 이용한 간 위치 추정 방법은, 전체 몸의 듀얼 에너지(Dual Energy) X-RAY 영상을 획득하는 제1단계； 상기 제1단계에서 생성된 듀얼 에너지(Dual Energy) X-RAY 영상의 감쇄 정도 차이를 이용하여 뼈 이미지(bone image)를 생성하는 제2단계； 상기 제1단계에서 생성된 듀얼 에너지(Dual Energy) X-RAY 영상의 감쇄 정도 차이를 이용하여 뼈 성분이 제거된 조직 이미지(tissue
