iaea human health series publications - SEDIM

Appendix IIICOMMON NON-CLINICAL ARTEFACTS ARISING IN DIGITAL MAMMOGRAPHY IMAGESImages of clinical artefacts are presented in Section 5.7 of this publication. This appendix provides furtherpictorial examples of non-clinical image artefacts that may be observed during routine QC testing or annualphysicist testing (Figs 39–45). This summary of artefacts should not be regarded as complete. Further examples canbe found in the literature [74].FIG. 39. The top image is of a uniform QC test object displayed with a narrow window acquired with an early model scanning digitalmammography unit demonstrating linear registration artefacts (arrows). These artefacts arise from the image reconstruction methodand are not regarded as clinically significant. The lower image, illustrating part of the same test object, indicates a more serious issueof an electronic (application specific integrated circuit (ASIC)) failure.143