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Long-term in-vitro precision of direct digital X-ray radiogrammetry

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Author

  • Alvilde Dhainaut
  • Mari Hoff
  • Johan Kalvesten
  • Stian Lydersen
  • Kristina Forslind
  • Glenn Haugeberg

Summary, in English

Digital X-ray radiogrammetry (DXR) calculates peripheral bone mineral density (BMD) from hand radiographs. The short-term precision for direct DXR has been reported to be highly satisfactory. However, long-term precision for this method has not been examined. Thus, the aim of this study was to examine the long-term in-vitro precision for the new direct digital version of DXR. The in-vitro precision for direct DXR was tested with cadaver phantoms on four different X-ray systems at baseline, 3 months, 6 months, and in one machine also at 12 months. At each time point, 31 measurements were performed. The in-vitro longitudinal precision for the four radiographic systems ranged from 0.22 to 0.43% expressed as coefficient of variation (CV%). The smallest detectable difference (SDD) ranged from 0.0034 to 0.0054 g/cm(2). The in vitro long-term precision for direct DXR was comparable to the previous reported short-term in-vitro precision for all tested X-ray systems. These data show that DXR is a stable method for detecting small changes in bone density during 6-12 months of follow-up.

Publishing year

2011

Language

English

Pages

1575-1579

Publication/Series

Skeletal Radiology

Volume

40

Issue

12

Document type

Journal article

Publisher

Springer

Topic

  • Radiology, Nuclear Medicine and Medical Imaging

Keywords

  • Digital X-ray radiogrammetry
  • Precision
  • Rheumatoid arthritis
  • Osteoporosis
  • Bone mineral density

Status

Published

ISBN/ISSN/Other

  • ISSN: 1432-2161