ASME B89.4.23 pdf download X-Ray Computed Tomography (CT) Performance Evaluation 1 scOPE This Standard specifies the dimensional measurement accuracy of industrial X-ray computed tomography (CT)systems for length, size, and form measurands of sphere-based test objects made of homogeneous materials.Medical cT systems are outside the scope of this Standard.The material properties of the measured test objectsare restricted to three classes of...