Technical articles

Metallic screens gamma computed radiography

Investigation of the effect of metallic screens on image quality in gamma computed radiography

Nick D‘Ademo, DÜRR NDT

15. Nov 2018 /

The role of metallic screens in computed radiography for controlling scattered radiation is very well-known. This paper extends this topic further and quantitatively investigates how image quality in terms of signal-to-noise ratio (SNR) and basic spatial resolution (SRb) is influenced by metallic screens when Iridium-192 is used as the radiation source.

Practical guideline for digital radiographic testing of welds according to ISO 17636-2

Uli Pöhler, DÜRR NDT; Steve Jelfs, DÜRR NDT

06. Sep 2017 /

As standards become increasingly important in radiographic testing, knowing how to properly apply these standards in real-world applications is now more crucial than ever. Learn how to apply the ISO 17636-2 standard using a steel weld plate as an example and shorten your time to a high-quality image.

Fully-Automated Weld Inspection of Aerospace turbines enabled by Digital Radiography

Nick D‘Ademo, DÜRR NDT; Wolfgang Schultz, DÜRR NDT

04. Sep 2017 /

As the digitization of X-ray technology continues to expand in the NDT inspection world, many manual inspection tasks can now be fully automated. The main benefits are a significant increase in productivity and efficiency as well as higher end-product quality.

Influence of the laser spot size on the image quality of a CR system

Steve Jelfs, NDT Specialist, DÜRR NDT

12. Jul 2017 /

Computed Radiography (CR) is a digital imaging technology where phosphor imaging plates (IP’s) take the place of conventional radiographic film. Once the IP’s are exposed to radiation, the CR scanner uses a focused laser to read the information from the imaging plate and transfer it to software that renders an image on a computer.

Quick industrial X-ray testing without intermediate data carriers of information

Prof. V.A. TROITSKIY, The E.O.Paton Electric Welding Institute of the National Academy of Science of Ukraine

18. May 2017 /

Flash-radiography (FR) is the radiography without intermediate data carriers (films and storage plates). FR produces a quick image. It provides for low cost of testing, capability of multi-angle real time monitoring of internal defects of the objects.