EVS-EN IEC 61267:2026

This International Standard applies to test procedures which, for the determination of characteristics of systems or components of medical diagnostic X-ray equipment (3.2.46), require well-defined X-ray radiation condition (3.1.6).
Except for mammography, this standard does not apply to conditions where discontinuities in radiation absorption of elements are deliberately used to modify properties of the radiation beam (3.2.32) (for example by rare earth filters).
X-ray radiation condition (3.1.6) for screen-film sensitometry are not covered in this standard.
NOTE: Screen-film sensitometry is the subject of the ISO 9236 series.
This standard deals with methods for generating X-ray beams characterized by X-ray radiation conditions which can be used under test conditions typically found in test laboratories or in manufacturing facilities for the determination of characteristics of medical diagnostic X-ray equipment (3.2.46) .
Examples of such are X-ray beams emerging through the filtration from an X-ray source assembly (3.2.51) whereby the radiation field (3.2.34) includes only an insignificant amount of scattered radiation (3.2.38) . X-ray radiation condition (3.1.6) can also represent the more general case, where scattered radiation (3.2.38) emerges from an exit surface (3.1.4) of a patient (3.2.25) or a phantom (3.2.27).