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The x-ray test patterns are used for high-contrast and/or spatial resolution measurements.
The procedure has a long tradition in x-ray QA and service and is easy to perform.
The test patterns are used to evaluate film-screen systems, magnification techniques and resolution capabilities of x-ray imaging systems.
The patterns consist of various lead thicknesses. The respective thickness is usually specified on each pattern. Each test pattern is usually enclosed in plastic, i.e. tissue equivalent material.
The resolution range for each pattern varies depending on the test type.