Computed tomography

Our completely non-destructive and non-contact component testing method reveals what other methods can’t, such as hidden defects, internal structures and complex geometries. It provides a 100% capture of the component’s actual condition.

Our CT systems are equipped to handle all your 3D measurement and analysis needs. We use three distinct X-ray technologies:

  • Microfocus tube – the established standard in CT technology.
  • High-flux technology – we use this for components that are more challenging to scan (e.g., denser materials). This method delivers superior data quality.
  • Nanofocus tube – as the name suggests, the focal point of this tube lies within the nanometer range.

Applications
Computed tomography is currently the most detailed method available for fully digitizing components. It can create digital twins, provide data for quality verification, and serve as a basis for reverse engineering or additive manufacturing. The data it generates forms the basis for all subsequent analyses. Here are some examples of its applications: First Article Inspection (FAI, including according to ISO GPS standards), nominal-actual comparison, assembly analysis, defect analysis (porosity, voids, cracks, collisions), wall thickness analysis, fiber composite analysis, derivation of tool correction data, creation of simple 2D X-ray images, for example, for checking printed circuit boards in the electronics industry.


We also prioritize quality and experience in our choice of analysis software. We use Volume Graphics VGSTUDIO MAX, ZEISS INSPECT, and ZEISS CALYPSO.

    Assembly analysis
    Assembly analysis
    Nominal-actual comparison
    Nominal-actual comparison
    Computed tomography system
    CT laboratory
    What materials can be inspected with CT?

    A wide variety of materials can be scanned using computed tomography. This includes steel parts. CT scans use X-rays, so the X-rays must be able to fully penetrate and pass through the sample in all directions. Therefore, in the case of denser materials, maximum wall thickness is the primary limiting factor determining whether CT can be used. Our CT systems are capable of scanning steel parts with a wall thickness of up to approx. 20 mm. In the case of plastic parts, this limit is many times higher, because plastic is much less dense.

    Do the parts need to be pre-treated before a CT scan?

    No, the parts do not require any pre-treatment, and we do not pre-treat them in any way.

    What is the accuracy of the CT data measurements?

    Our CT systems are validated according to VDI/VDE 2630, Part 1.3, and have a system accuracy of MPE SD ≤ 3.8 µm + L/100. (SD: sphere center-to-center distance deviation | L: The length to be measured on the component

    Example: When measuring a diameter of 50 mm, the maximum length measurement deviation is +/- 4.3 µm.

    What is the difference between resolution and accuracy?

    Resolution primarily indicates the level of detail that can be detected. For example, if you need to find pores with a diameter of 0.2 mm in a material, a voxel size (resolution) of ≥ 0.2 mm is insufficient to reliably determine the dimensions of the pores found. In such cases, the resolution of the CT data should be significantly higher. Accuracy is the maximum deviation that the measurement results can have.

    What is the maximum component size that can be scanned with CT?

    We can scan components with a maximum dimension of ⌀ 360 mm and a length of 400 mm in a single CT scan. Since the component rotates 360° during the scan, you can visualize the maximum size as a cylinder. Components that are larger than this can be scanned using a “multiscan” method. This involves performing several CT scans across the component and then digitally stitching them together. The fundamental limiting factor here is whether the component fits inside the CT system cabinet. Ideally, it should also be able to be rotated 360°.

    What is the maximum achievable resolution for the CT data?

    Our CT systems can achieve resolutions of < 1 µm. However, several factors need to be considered, such as the component’s dimensions and material.

    Can several parts be scanned in a single CT scan?

    Yes, multiple components can be scanned simultaneously in a single CT scan as long as the required resolution (level of detail) of the CT data can be reached and the component dimensions and material density allow it.

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    MessX scans, digitizes, analyzes, and measures. And helps ensure that industrial components and objects earn a reputation for being “completely reliable”.