BS EN 62220-1-2-2007 PDF

Full title and description

STB BS EN 62220-1-2:2007 — Medical electrical equipment — Characteristics of digital X‑ray imaging devices — Part 1‑2: Determination of the detective quantum efficiency (DQE) — Detectors used in mammography. This document (BS EN adoption of IEC 62220‑1‑2:2007) specifies methods and test conditions for measuring the detective quantum efficiency of digital X‑ray detectors intended for mammographic imaging, including CR, direct and indirect flat‑panel detectors, CCD scanning and photon‑counting detectors.

Abstract

This standard gives a procedure to determine the detective quantum efficiency (DQE) of digital X‑ray imaging devices as a function of air kerma and spatial frequency under manufacturer‑specified working conditions for mammography applications. It defines test geometry, radiation quality, corrections to raw data, calculation of noise and signal power spectra, and reporting formats for conformance statements; it is intended primarily for manufacturers and well‑equipped test laboratories. The Part 1‑2 text restricts application to mammographic detectors and excludes general radiography, dental radiography, computed tomography and dynamic imaging modalities.

General information

• Status: Published / Adopted as a BS EN national implementation (definitive publication).
• Publication date: IEC base publication: 5 June 2007; BS EN adoption (UK): 30 November 2007.
• Publisher: International Electrotechnical Commission (IEC) — base document; British Standards Institution (BSI) — BS EN national publication.
• ICS / categories: 11.040.50 (Radiographic equipment).
• Edition / version: Edition 1.0 (2007) — IEC 62220‑1‑2 ed.1.0 adopted as BS EN 62220‑1‑2:2007.
• Number of pages: IEC published version: 59 pages (IEC webstore); BS EN national PDF: approximately 34 pages (national formatting may differ).

Scope

The standard specifies the method for determining DQE(u,v) for digital X‑ray imaging detectors used in mammography as a function of air kerma and spatial frequency, under the working conditions relevant to the intended medical application. It defines required test equipment, geometry, irradiation conditions, data corrections (including lag and other detector effects), procedures to compute input noise power spectrum and DQE, accuracy requirements and the format for conformance statements. The part is explicitly restricted to mammographic detectors and is not applicable to general radiography, dental radiography, CT or dynamic imaging.

Key topics and requirements

• Definition and formula for detective quantum efficiency DQE(u,v) and required parameters for evaluation (signal transfer, noise power spectra, input exposure/air kerma).
• Specification of operating and irradiation conditions (radiation quality, geometry, air kerma levels) appropriate for mammography testing.
• Test device and image acquisition requirements (flat‑field, edge or slit methods, line‑spread and modulation transfer function measurements where applicable).
• Corrections to raw data (offsets, gain non‑uniformity, lag effects) and annex guidance on lag determination.
• Calculation methods for input noise power spectrum and DQE as a function of spatial frequency; reporting formats and conformance statement template.
• Accuracy, uncertainty considerations and recommended equipment/calibration for laboratories performing the tests.

Typical use and users

Primary users are detector and system manufacturers, independent test laboratories, clinical physicists performing acceptance testing or performance characterization, and regulatory bodies verifying performance claims for mammography detectors. The standard is used to compare detector performance, to document DQE for datasheets and regulatory submissions, and to support optimization of imaging chains in mammography.

Related standards

IEC/EN 62220 is a multi‑part series. Relevant related documents include IEC 62220‑1:2003 (general method for DQE determination for projection detectors) and IEC 62220‑1‑3:2008 (determination of DQE for detectors used in dynamic imaging). Other related standards for radiographic imaging, detector characterization and mammography quality assurance (for example IEC TR guidance documents and national adoption texts) may be used alongside this part for comprehensive test programmes.

Keywords

detective quantum efficiency; DQE; digital mammography; X‑ray detectors; flat‑panel detector; computed radiography (CR); photon‑counting; CCD; detector characterization; image quality; noise power spectrum; modulation transfer function.

FAQ

Q: What is this standard?

A: It is the BS EN adoption of IEC 62220‑1‑2:2007 — a technical standard that defines how to measure and report the detective quantum efficiency (DQE) of digital X‑ray detectors used for mammography.

Q: What does it cover?

A: It covers test geometry, radiation quality, image acquisition, required corrections to raw data, calculation of input noise power spectra and DQE as a function of spatial frequency and air kerma, accuracy/uncertainty considerations, and the format for a conformance statement. It is limited to detectors for mammographic imaging and excludes general radiography, CT and dynamic modalities.

Q: Who typically uses it?

A: Manufacturers of mammography detectors and systems, accredited test laboratories, clinical medical physicists and regulators or procurement teams who need standardized, comparable performance data for mammography detectors.

Q: Is it current or superseded?

A: The document is the 2007 edition of IEC 62220‑1‑2 adopted as BS EN 62220‑1‑2:2007. Users should check for later amendments or newer related parts in the 62220 series (for example Part 1‑3 published in 2008) or newer revisions before using it as the sole reference for compliance or procurement.

Q: Is it part of a series?

A: Yes — IEC/EN 62220 is a multi‑part series addressing DQE determination for different detector applications. Part 1 is the general method (2003), Part 1‑2 (this document) is for mammography, and Part 1‑3 covers dynamic imaging detectors (2008).

Q: What are the key keywords?

A: DQE, detective quantum efficiency, digital mammography, X‑ray detector, CR, flat‑panel, photon‑counting, noise power spectrum, MTF, image quality.