Calibration method and measuring method for measuring X-ray CT apparatus, and X-ray CT apparatus for measurement

摘要

Problem to be solved: to accurately measure the boundary surface of the subject to achieve high accuracy of the X-ray CT for measurement.A CT scan is performed in which the spherical type calibration jig 30 is previously contacted with the subject W, and the volume data is generated.To obtain the profile of the surface shape of the subject w in the volume data andThe boundary surface of the spherical type calibration jig 30 is calculated from the center coordinate of the spherical type calibration jigA correction value is obtained for matching the boundary surface of the object W obtained from the inclination of the profile to the boundary surface of the spherical type calibration jigThe boundary surface of the subject W is obtained using the correction valueThe shape of the object W is determined using the boundary plane.Diagram