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 objects arerestrictedtothreeclassesofmaterialselectedtoberepresentativeofindustrialmaterials: plasticpolymers,aluminum...