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Abstract:	In the recent past X-ray computed tomography (CT) has been established as an additional sensor for coordinate measurement machines (CMM´s). To reach for high accuracy and traceable measurement results systematic deviations of CT measurements must be corrected. The deviations, commonly known as artifacts, are influenced by many different and varying factors like geometry and material of the workpiece, design of the CT-sensor and actual parameters of the X-ray components. This paper gives an overview about systematic deviations and deals with various approaches for correcting CT-artifacts. The different approaches are discussed and compared to each other. A method for correcting directly on the workpiece (Auto-correction) by the use of optical or tactile-optical sensors which also leads to traceable CT-measurements is described in detail. Measurement results using Auto-correction on a multisensor-CMM comprising a CT-sensor will be presented and compared to other results. In this context also actual approaches to establish standards for the specification, acceptance and reverification tests for CMM´s with CT-sensor are described.