Performance testing of dimensional X-ray computed tomography systems

X-ray Computed Tomography (XCT) has become a common tool for dimensional analysis as it allows non-destructive internal and external measurements. Manufacturers often specify the accuracy of dedicated metrology XCT systems maximum permissible error ( MPE ) statement determined using workpieces, test lengths positions that are significantly different between manufacturers. The VDI/VDE 2630-1.3:2011 guideline provides specification respective methods to verify performance against these statements been applied in this study evaluate four commercial uniform way. For examination multi-sphere object was developed explicitly complies with guidelines maximises use whole measurement volume, which then scaled both high low magnifications. consisted two parts: scans according protocol allow fair comparison all free where manufacturers could show best capabilities their system. With particular objects no system complied its own statement, however sub voxel accuracies were found. terms voxels ranged 0.16 0.43 magnification (voxel size 100 μm) 0.49 0.82 14 systems. This indicates need greater standardisation transparency on how determined, more directed protocols testing In due extreme range volumes sizes/resolutions capable of, is demonstrated maybe reasonable consider an dependent size. • evaluated. reference standard designed 2630 guidelines. design statement. Every achieved sub-voxel errors large small volumes.