BS EN 462-1:1994(2008) Non - destructive testing — Image quality of radiographs — Part 1 : Image quality indicators (wire type) — Determination of image quality value
2013BS EN ISO 19232-1:2013 Non-destructive testing. Image quality of radiographs. Determination of the image quality value using wire-type image quality indicators
1994BS EN 462-1:1994 Non-destructive testing - Image quality of radiographs - Image quality indicators (wire type) - Determination of image quality value