Arch Phys Med Rehabil, 2006 · DOI: 10.1016/j.apmr.2006.07.257 · Published: October 1, 2006
This study investigates the accuracy of bone density measurements using a pQCT scanner in people with and without spinal cord injury (SCI). It looks at how errors in measuring limb length can affect the placement of the scanner and the resulting bone mineral density (BMD) readings. The study found that errors in measuring tibia length can lead to differences in BMD measurements, especially in people with SCI. This is important because it can affect the results of studies that are trying to find ways to prevent bone loss after SCI. The researchers suggest that people who use pQCT scanners should be careful to measure limb length accurately and consistently. They also suggest that studies should consider the potential for error when comparing BMD measurements between different groups of people.
Clinical and technical personnel should use consistent methods to determine tibia length and periodically repeat measurements to establish a high level of repeatability.
Future studies should consider the potential source of error when determining the efficacy of interventions to preserve tibia BMD after SCI.
Interpretation of the tibia endplate should be routinely revisited among all staff performing these measurements to ensure a high level of scan-site accuracy.