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Review
. 2014 Feb;21(1):2-7.
doi: 10.11005/jbm.2014.21.1.2. Epub 2014 Feb 28.

Quality Control of DXA System and Precision Test of Radio-technologists

Ho-Sung Kim  1 , Seoung-Oh Yang  2
Affiliations
Review

Quality Control of DXA System and Precision Test of Radio-technologists

Ho-Sung Kim et al. J Bone Metab. 2014 Feb.

Abstract

The image quality management of bone mineral density (BMD) is the responsibility and duty of radio-technologists who carry out examinations. However, inaccurate conclusions due to the lack of understanding and ignorance regarding the methodology of image quality management can be a fatal error to patients. The accuracy and precision of BMD measurement must be maintained at the highest level so that actual biological changes can be detected with even slight changes in BMD. Accuracy and precision should be continuously preserved for image quality of machines. Those factors will contribute to ensure the reliability of BMD examination. The enforcement of proper quality control of radiologists performing BMD inspections which brings about the durability extensions of equipment and accurate results of calculations will help the assurance of reliable inspections.

Keywords: Bone density; Densitometry; Dual-energy X-ray absorptiometry; Precision; Quality control.

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Conflict of interest statement

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1
General phantoms and scan images. (A) The European Spine Phantom (ESP; QRM GmbH Dorfstrasse 4. 91096, Möhrendorf, Germany). (B) ESP scan image. (C) Bio-imaging bone fide spine phantom (BFP; Bio-Imaging Technologies Inc., Newtown, PA, USA). (D) BFP scan image.
Fig. 2
Fig. 2
Precision test method.
Fig. 3
Fig. 3
Calculation of least significant change (LSC) at 95% confidence level (in case of device error: 1%, operator error: 1%).
Fig. 4
Fig. 4
Variation of precision error according to confidence level.
See this image and copyright information in PMC

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