BS EN IEC 62220-2-1:2023

Medical electrical equipment. Characteristics of digital X-ray imaging devices.-COPY. Part 2-1: Determination of dual-energy subtraction efficiency. Detectors used for dual-energy radiographic imaging-COPY | Status: Current

1 Scope This document describes the performance metrics associated with dual-energy imaging capable digital X-ray imaging devices meant for medical applications and specifies the methods for their determination. These metrics can be used to analyse tissue-subtracted images and to evaluate dose performance, noise characteristics, and tissue-subtraction efficacy of digital X-ray imaging devices. The described methods indicate the procedures to obtain multi-spectral primary data and to compute their derived tissue-subtracted images. The intended users of this document are manufacturers and well-equipped test laboratories. This document is restricted to digital X-ray imaging devices that are used for single or multiple exposure dual-energy radiographic imaging based on, for example, CR systems, direct and indirect flat panel-detector based systems. This document excludes and is not applicable to:

• — digital X-ray imaging devices intended to be used in mammography or in dental radiograp hy;
• — slot scanning digital X-ray imaging devices;
• — computed tomography or cone-beam computed tomography;
• — photon-energy discriminating devices such as photon counting X-ray imaging devices;
• — devices for dynamic imaging (where series of images are acquired, as in fluoroscopy or cardiac imaging).
• — digital X-ray imaging devices intended to be used with radiotherapy beams.