BS EN ISO 16371-2:2017

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Personnel qualification
6 Classification of computed radiographic techniques
  and compensation principles
7 General
8 Recommended techniques for making computed
  radiographs
9 Test report
Annex A (normative) - Determination of basic
        spatial resolution SR[b][detector]
Annex B (normative) - Determination of normalized
        SNR[N] from SNR[measured]
Annex C (normative) - Determination of minimum
        grey value
Bibliography

Defines fundamental techniques of computed radiography with the aim of enabling satisfactory and repeatable results to be obtained economically.

This document specifies fundamental techniques of computed radiography with the aim of enabling satisfactory and repeatable results to be obtained economically. The techniques are based on the fundamental theory of the subject and tests measurements. This document specifies the general rules for industrial computed X-rays and gamma radiography for flaw detection purposes, using storage phosphor imaging plates (IP). It is based on the general principles for radiographic examination of metallic materials on the basis of films, as specified in ISO5579. The basic set-up of radiation source, detector and the corresponding geometry are intended to be applied in accordance with ISO5579 and corresponding product standards such as ISO17636 for welding and EN12681 for foundry.

This document does not lay down acceptance criteria of the imperfections. Computed radiography (CR) systems provide a digital grey value image which can be viewed and evaluated on basis of a computer only. This practice describes the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important but not the main focus of this document.

The procedure it specifies provides the minimum requirements and practice to permit the exposure and acquisition of digital radiographs with a sensitivity of imperfection detection equivalent to film radiography and as specified in ISO5579. Some application standards, e.g. EN16407, can require different and less stringent practice conditions.