Static and mobile DXA scanner in-vivo cross-calibration study

Abstract

In-vitro cross-calibration of DXA scanning equipment, with a phantom device, has been recommended for assessing agreement between devices co-located within DXA scanning services.

This study evaluated in-vivo and in-vitro cross-calibration of a static and a mobile DXA scanner within the same service in their individual clinical settings.

50 individuals from a volunteer group were recruited to take part in this study and had DXA measurements made on two GE Lunar Prodigy Advance (GE Lunar, Bedford, UK) scanners.

Results in this study showed that the scanners agreed, with no clinically significant differences in BMD measurements made at the same site on the individual devices used in this study. The in-vivo cross-calibration of the instruments was a useful experience, which demonstrated closely calibrated systems and raised the profile of the bone densitometry service within the hospital.