What is CR Technology? | How does Computed Radiography work?

What is Computed Radiography?

How does it work?

Computed Radiography (CR) is the production of a digital image by using a Phosphor Imaging Plate (IP) in place of conventional film.

IPs are reusable

No dark room or chemicals required

Exposure and process times reduced

Easy work flow and image optimisation with D-Tect software

Simple to share digital information and archive

The CR technology consists of a 3-step process

The Imaging (storage) Plate (IP) is exposed with X-ray or Gamma radiation, which causes the IP phosphor layer in the plate to store the image.

During the reading process of the plate in the scanner, a focused laser beam triggers the release of the stored image data in the form of visible light.

The emitted light is detected, captured and converted into electrical signals which are digitized and finally displayed as a digital image on the PC monitor.

The internal in-line eraser purges the residual data from the IP, which is then ready for the next exposure.

Imaging plate scanner

What is important?

With film radiography the only variable is the film, with CR we have different IP's and the ability to adjust multiple scanner parameters to suit the required inspection task and optimize the image quality.

High definition Computed Radiography

DÜRR NDT is the first company worldwide that has developed a 12.5μm laser spot scanner that, with correspondingly high resolution phosphor storage imaging plates, has met all of the stringent requirements of EN 14784 and ASTM 2446. The combination of high resolution Imaging Plates and this HD-CR device achieves the unique Basic Spatial Resolution of 30μm over all system classes for the first time. (Certified by BAM)


Adjustable resolution

The HD-CR device gives the user the choice to select a 20 μm scan resolution for weld inspection or 100 μm scan resolution for a CUI application where speed and a short exposure really are the prime requirements. The stepless scan resolution ensures that the correct settings can be set to suit the application and inspection needs.

Why CR-Technology from DÜRR NDT

DÜRR NDT is committed to deliver products perfectly tailored to meet the needs of the market.

Through the continuous optimisation of existing products and development of new solutions, DÜRR NDT has rapidly become one of the market leaders in non-destructive testing.

CR Products

HD-CR 35 NDT imaging plate scanner

Imaging Plate Scanner

High resolution CR scanner for all NDT radiography applications - weld testing, profile images and aerospace.

Imaging Plates

Imaging Plates

IPs are available in different resolutions and all standard formats and, on request, in special sizes and custom shapes.

D-Tect NDT imaging software

D-Tect Software

All functions from image acquisition, analysis and related report generation, to export, archiving and database management are included.

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