Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Part 1-3) which is identical with IEC 62220-1-3 : 2008 ‘Medical electrical equipment —Characteristics of digital X-ray imaging devices — Part 1-3: Determination of the detective quantum efficiency—Detectors used in dynamic imaging’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Electromedical, Diagnostic Imaging and Radiotherapy Equipment Sectional Committeeand approval of the Medical Equipment and Hospital Planning Division Council.

This standard is published in various parts. Other parts of the standardare:

Part 1 Determination of the detective quantum efficiency

Part 1-2 Determination of the detective quantum efficiency — Detectors used in mammography

DIGITAL X-RAY IMAGING DEVICES are increasingly used in medical diagnosis and will widely replace conventional (analogue) imaging devices such as screen-film systems or analogue X-RAY IMAGE INTENSIFIER television systems in the future. It is necessary, therefore, to define parameters that describe the specific imaging properties of these Digital X-RAY IMAGING DEVICES and to standardize the measurement procedures employed.

There is a growing consensus in the scientific world that the Detective Quantum Efficiency (DQE) is the most suitable parameter for describing the imaging performance of an X-ray imaging device. The DQE describes the ability of the imaging device to preserve the signal- to-noise ratio from the radiation field to the resulting digital image data. Since in X-ray imaging, the noise in the radiation field is intimately coupled to the AIR KERMAlevel, DQE values can also be considered to describe the dose efficiency of a given DIGITAL X-RAY IMAGING DEVICE.

This standard has,therefore, been developed in order to specify the measurement procedure together with the format of the conformance statement for the DETECTIVE QUANTUM EFFICIENCY OF DIGITAL X-RAY IMAGING DEVICES.

In the DQE calculations proposed in this standard, it is assumed that system response is measured for objects that attenuate all energies equally.

This standard will be beneficial for manufacturers, users, distributors and regulatory agencies. It can be regarded as the first of a series describing all the relevant parameters of digital X-ray imaging devices.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used asa decimal marker while in Indian Standards, the current practice is to use a point (.) as thedecimal marker.