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

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.

• Författare: Alvilde Dhainaut; Mari Hoff; Johan Kalvesten; Stian Lydersen; Kristina Forslind; Glenn Haugeberg
• Avdelning/ar: Kliniska Vetenskaper, Helsingborg
• Publiceringsår: 2011
• Språk: Engelska
• Sidor: 1575-1579
• Publikation/Tidskrift/Serie: Skeletal Radiology
• Volym: 40
• Issue: 12
• Länkar: http://dx.doi.org/10.1007/s00256-011-1187-2
• Dokumenttyp: Artikel i tidskrift
• Förlag: Springer
• Ämne: Radiology, Nuclear Medicine and Medical Imaging
• Nyckelord: Digital X-ray radiogrammetry; Precision; Rheumatoid arthritis; Osteoporosis; Bone mineral density
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1432-2161