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Computed radiography in NDT applications

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Computed radiography, or digital radiography by use of reusable storage phosphor screens, offers a convenient and reliable way to replace film. In addition to the reduced cost on consumables, the return on investment of CR systems is strongly determined by savings in exposure time, processing times and archival times. Furthermore, intangible costs like plant shutdown, environment safety and longer usability of isotopes are increasingly important when considering replacing film by storage phosphor systems.

But more than in traditional radiography, the use of digital images is a trade-off between the speed and the required quality. Better image quality is obtained by longer exposure times, slower phosphor screens and higher scan resolutions. Therefore, different kinds of storage phosphor screens are needed in order to cover every application.

Most operations have the data, associated with the tests to be performed, centrally stored in a database. Using a digital radiography system gives not only the advantages of the manipulation of digital images, but also the digital data that is associated with it. Smart methods to associate cassettes and storage screens with exposed images enhance the workflow of the NDT processes, and avoid human error. Automated measurements tools increase the throughput in different kinds of operations.

This paper gives an overview of the way certain operations have decided to replace film by computed radiography, and what the major benefits for them have been.
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Document Type: Research Article

Affiliations: GE Inspection Technologies, Berchem, Belgium

Publication date: 2004-10-01

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