Abstract
The micro-focus XCT system is a powerful technique to visualize the inner structure of rocks nondestructively with 2.0μm resolution. Although the XCT image includes some errors resulting from beam hardening, ring artifacts, quantum noise and dependency on the condition of accelerating voltage and current, noise can be reduced by usage in the best imaging conditions. Quantitative treatment is possible in the same conditions with consideration of the cause of the error. We also constructed the transformation from grading on the micro-focus XCT image to a generalized CT value.
