CT scanners – find manufacturers and suppliers

CT scanners are imaging devices that use X-rays to create three-dimensional images of an object's internal structure.

While they are well known in medicine, they also play an important role in industry, materials research, quality assurance, archaeology and security checks. The ability to analyze objects non-destructively and with high resolution in their volume makes the computer tomograph an indispensable tool for a wide range of specialist areas.

Below you will find the functionality and types of CT scanners, their areas of application and their advantages:

How CT scanners work:

The basic idea of a CT scanner is to scan an object from many different directions and reconstruct a complete 3D model from the different attenuation values.

The way it works involves several steps:

1. X-ray generation:
   An X-ray source emits radiation that penetrates the object.
   Denser or thicker areas attenuate the radiation more strongly.
2. Rotation and projection detection:
   As the X-ray source and detectors rotate around the object being examined, or the object on a turntable, a variety of images are created from different angles.
3. Detection:
   A digital detector measures the intensity of the radiation after it passes through the object.
   It provides a two-dimensional projection image of each rotational position.
4. Reconstruction:
   Mathematical algorithms are used to combine the 2D projections into a three-dimensional volume model.
   Typical methods are filtered back projection or iterative reconstruction methods.
5. Analysis and visualization:
   The software enables sectional planes, porosity analyses, density distributions, dimensional measurements and virtual inspections.

This makes it possible to visualize internal structures that are not accessible from the outside - and completely non-destructively.

Types of CT scanners:

There are different CT system types depending on the intended use and design.

1. Conventional medical CT:
   These systems are used in hospitals.
   They offer fast acquisition of large volumes, are designed for patient safety and provide good spatial resolution for diagnostic purposes.
2. Industrial CT:
   Industrial CT systems are optimized for materials such as metal, plastic, ceramics or composites.
   They operate at a higher energy level and are particularly robust.
   The main areas of application are quality assurance, production and research.
3. Micro-CT:
   These systems enable extremely high spatial resolutions in the micrometer range.
   Areas of application include electronics, material analysis, biological samples or micro-components.
4. Nano-CT:
   A further development of micro-CT that achieves resolutions in the sub-micron or nanometer range.
   Ideal for scientific analysis of very small structures.
5. Cone-beam CT (CBCT):
   Uses a cone-shaped beam and is commonly found in dentistry, orthopaedics and industrial applications for faster volumetric imaging in the small to medium volume range.
6. Inline CT:
   Designed for industrial production flow.
   Works quickly, automatically and is integrated into production lines to continuously inspect components.

Areas of application for CT scanners:

CT scanners are used in a variety of industries. Among the most important are:

1. Medicine:
Diagnostic imaging of soft tissues, bones, organs, blood vessels or undetected internal injuries.
CT is an important procedure in emergency medicine and oncology.

2. Industry and manufacturing.
Failure analysis of cast and injection-molded parts, testing of additively manufactured components, detection of pores, cavities, dimensional deviations or material defects.
CT enables precise measurements of internal geometries.

3. Electronics:
Inspection of soldered joints, printed circuit boards, semiconductor structures, bonded joints and the smallest components.
Micro-CT is particularly popular here.

4. Materials research:
Analysis of fibers, porosity, microstructure, cracks, composite materials or biological samples.

5. Archaeology and art:
Examination of ancient artifacts or fossils without damaging them.
CT provides insights into internal structures, material layers or repairs.

6. Security and transportation
Luggage and freight inspection to detect dangerous objects or hidden structures.
Modern security CTs enable volume analyses in real time.

Advantages of CT scanners:

CT systems offer a number of advantages that make them unique and valuable for many fields.

• The greatest strength is non-destructive 3D analysis: internal structures can be fully examined without opening, damaging or destroying an object.
• High resolution and detail: Micro- and nano-CT provide microscopic insights into materials and components.
• Volumetric information: Instead of a single image, CT provides a complete 3D model. This enables virtual sections, measurements and complex analyses.
• Versatile material applicability: CT is suitable for almost all materials, including metals, plastics, tissue, biological samples or composite materials.
• Detection of hard-to-identify defects: Pores, cracks, inhomogeneities, inclusion materials or hidden structures are reliably visualized.
• Can be automated: Industrial CT systems in particular can be combined with software for automatic defect detection, tolerance testing or statistical evaluation.
• Reduced inspection effort: Many inspections that used to be time-consuming or impossible can now be carried out faster, more precisely and without disassembly.

CT scanners are powerful tools for the complete analysis of internal structures - regardless of whether they are used for medical diagnostics, industrial quality assurance, scientific research or security applications. Their ability to provide three-dimensional information non-destructively makes them an indispensable part of modern technology and research. With different CT types, resolution ranges and specializations, systems can be adapted precisely to the application, material and analysis objective. As a result, CT scanners open up a wide range of possibilities for improving quality, safety, knowledge gain and process stability.

Here you will find an overview of the most important points to consider when purchasing CT scanners:

The purchase of a CT scanner - especially in an industrial environment - is a complex investment that goes far beyond the mere price of the device. CT systems have a significant influence on quality assurance, development processes, production speed and error analysis. At the same time, CT solutions differ greatly in terms of their resolution, radiation output, mechanics, reconstruction algorithms and software functions. A well-prepared purchase prevents bad investments, ensures future viability and ensures that the selected system meets the technical and organizational requirements in the long term.

• Every selection begins with a clear definition of the intended use:
• Which materials are to be tested (metal, plastic, ceramic, electronics)?
• How large are the components and what are the wall thicknesses?
• Should micrometer or even sub-micrometer details be visible?
• Is it a measurement task, pure error analysis or process control?
• Will the CT inspection take place in the laboratory, in prototype development or inline in production?
• A precise needs analysis is crucial to ensure that the power, radiation source and detector capacity are optimally selected.
• Selecting the right X-ray source because this is the key factor:
• The penetration power.
• The achievable resolution.
• The scanning time.
• Suitability for different materials.
• Important criteria here are
• Voltage and power: Higher voltage enables the inspection of dense materials such as steel, but often reduces the resolution.
• Focal spot size: Smaller focal spots provide better detail resolution, but are less powerful. Compromises often have to be found for high-density components.
• Stability and lifetime: A high-quality and stable X-ray tube reduces downtime and delivers reproducible results.
• The detector is just as important as the X-ray source, as it directly influences the image quality.
• Pixel size and resolution: Smaller pixels enable finer structure detection.
• Detector size: The larger the detector, the larger components or volumes can be captured without multiple images.
• Sensitivity and dynamic range: High dynamic range ensures good imaging of both weakly and strongly absorbing areas.
• Image noise and calibratability: Stable detectors with low drift are essential for measurement applications.
• The mechanical components of a CT system determine precision and stability.
• Turntable accuracy: Metrological CT applications require high-precision axis guidance with minimal concentricity error.
• Load capacity and component size: The rotary table must be able to safely support the maximum test part weight.
• Unsteady mechanics reduce reconstruction quality and extend the scan time.
• Stable, temperature-compensated mechanical systems are particularly important for micro and nano CT.
• The reconstruction software and data processing is often the decisive factor for operability, speed and analysis quality.
• Important features are:
• Reconstruction algorithms: Modern systems offer iterative procedures that reduce image artifacts and increase resolution.
• Automatic artifact reduction: Ring artifacts, beam hardening and scattered radiation can severely impair image quality.
• Analysis functions: Defect detection, porosity measurement, wall thickness analysis, dimensional measurement, comparison with CAD data.
• User interface and workflow: Intuitive software saves time, reduces operating errors and increases productivity.
• Computing power and memory: Large volumes of volumetric data require powerful hardware and efficient compression.
• A CT system is an X-ray system and is subject to strict regulations.
• Essential are:
• CE conformity and full safety certification.
• Radiation protection concept and leakage radiation values.
• Access control, door monitoring and emergency stop systems.
• Documentation requirements.
• Training and qualification of operating personnel.
• If there is a lack of clear documentation or certification, you should distance yourself from the provider.
• A computer tomograph is a long-term investment. The following points must therefore be taken into account:
• Regular maintenance. Tube replacement, detector calibration and mechanical adjustments.
• Availability of spare parts: Manufacturers with long-term product support are preferable.
• Service availability and response time: Short response times avoid long downtimes.
• Software updates: Up-to-date algorithms improve quality and speed and extend the service life of the system.
• Energy and cooling requirements: Some CT systems require extensive infrastructure, which should be planned for at an early stage.
• A CT system can only be used to its full potential if it is easily integrated into the workflow.
• The better the integration, the greater the real economic benefit.
• A CT system should not only meet today's requirements, but also be able to cope with future developments.
• Upgrade options for detectors, X-ray sources and software should therefore be available.
• A future-proof CT system protects the investment and prevents early obsolescence.

The professional purchase of a CT scanner requires careful consideration of technical, economic and organizational aspects. The X-ray source, detector, mechanics and software form the technical foundation, while service quality, integration and operating costs determine long-term performance. If you define the requirements precisely and choose a system that combines high image quality, stable mechanics, powerful analysis tools and comprehensive support, you get a tool that improves quality assurance, development and research in the long term.

CT scanners can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of CT scanners around the world on Exportpages.