Bone density measurement equipment, bone density measuring method and phantom null for bone density measurement

摘要

PROBLEM TO BE SOLVED: To measure both the bone density and microstructure of a fixed region of cancellous tissue of bone as a tested body at the same time non-destructively and accurately. ;SOLUTION: For a designated number of bone density measuring phantoms of at least two, projection data for calibration is sequentially collected by an X-ray CT device 100 and a control arithmetic device 200, according to the projection data for calibration, a CT image for calibration is recomfigurated by an image reconfiguration part 210, and according to the CT image for calibration, an anlytical curve between the CT value of the central part of the CT image for calibration and the hydroxyapatite density of the central part is created. Tested body projection data on a tested body 20 is collected by the X-ray CT device 100 and the control arithmetic device 200, according to the tested body projection data, a tested body CT image is reconfigurated by the image reconfiguration part 210, and according to the CT value of cancellous tissue of the CT image of the tested body and the analytical curve, the bone density of cancellous tissue of the tested body is measured by a tested body bone density acquiring part 230.;COPYRIGHT: (C)1999,JPO