The invention relates to a method for measuring a solid body (11), using a first measuring method (computed tomography method) X-raying the solid body, combined with a second measuring method for measuring at least one surface of the solid body (11). The aim of the invention is to increase utilization of the two measuring methods and to optimize the calculation of the results. According to the invention, measured values obtained by the second method are used to associate points on the surface of the solid body with respective local segmentation threshold values for the evaluation of the data obtained by the first measuring method. These threshold values can be used to determine additional local segmentation threshold values in the vicinity of the points.