Spatial resolution is an important parameter for performance test and verification of industri-al CT system.For industrial CT spatial resolution test card,there is no unified and easy to obtain mature products.In this paper,a spatial resolution test card is designed,then we verify its test accuracy by differ-ent methods.Finally,the test card is used to verify the spatial resolution performance of 6MeV industrial CT.Through calculation,when the CT number modulation R＞10％and CNR＞3,the spatial resolution of the high-energy CT system can be verified,that is 1LP/mm.Through this study,it provides data support and feasible test methods for CT performance verification.
Industrial CTSpatial resolutionTest card of line pairHigh-energy industrial CT
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