PROBLEM TO BE SOLVED: To provide an X-ray measurement apparatus which quantitatively calculates the thickness equivalent to a subcutaneous fat thickness of a subject.SOLUTION: An X-ray irradiation and detection machine projects an X ray to a subject and air areas around the subject, and detects the X ray to obtain a detection data group in the form of a two-dimensional array. A unit body composition calculation part calculates, based on the detection data group, a fat rate profile indicating variations in the body fat rate of the subject in a depth direction, or the direction from a body surface of the subject toward the inside of the subject. The fat rate is higher near a body surface of a subject, so a crest part 112 is also seen near the body surface of the subject in the fat rate profile. The crest part 112 indicates a subcutaneous fat area of the subject, so a body composition calculation part calculates a fat zone thickness of interest, which is the thickness equivalent to a subcutaneous fat thickness, with the width of the crest part 112 as the reference.SELECTED DRAWING: Figure 11COPYRIGHT: (C)2017,JPO&INPIT【課題】被検体の皮下脂肪厚相当の厚さを定量的に演算するX線測定装置を提供する。【解決手段】X線照射検出機により、被検体及びその周辺のエア領域に対してX線が照射され、X線を検出することで、2次元配列をもった検出データ群が取得される。単位体組成演算部は、検出データ群に基づいて被検体表面から体内側方向へ向かう深さ方向における被検体の体脂肪率の変動を示す脂肪率プロファイルを演算する。被検体表面近傍においては脂肪率が高くなっており、脂肪率プロファイルにおいて被検体表面近傍に山部112が認められる。山部112は被検体の皮下脂肪領域を示すものであることから、体組成演算部は、山部112の幅を基準として皮下脂肪厚相当の厚さである注目脂肪帯厚を演算する。【選択図】図11
