Femoral neck cortical geometry measured with magnetic resonance imaging is associated with proximal femur strength

Manske, S. L., Liu-Ambrose, T., de Bakker, P. M., Liu, D., Kontulainen, S., Guy, P., Oxland, T. R. and McKay, H. A. (2006) Femoral neck cortical geometry measured with magnetic resonance imaging is associated with proximal femur strength. Osteoporosis International, 17 10: 1539-1545. doi:10.1007/s00198-006-0162-6


Author Manske, S. L.
Liu-Ambrose, T.
de Bakker, P. M.
Liu, D.
Kontulainen, S.
Guy, P.
Oxland, T. R.
McKay, H. A.
Title Femoral neck cortical geometry measured with magnetic resonance imaging is associated with proximal femur strength
Journal name Osteoporosis International   Check publisher's open access policy
ISSN 0937-941X
1433-2965
Publication date 2006
Sub-type Article (original research)
DOI 10.1007/s00198-006-0162-6
Volume 17
Issue 10
Start page 1539
End page 1545
Total pages 7
Place of publication London, U.K.
Publisher Springer International
Language eng
Subject 1103 Clinical Sciences
Formatted abstract
Introduction Magnetic resonance imaging (MRI) is a promising medical imaging technique that we used to assess femoral neck cortical geometry.
Objectives Our primary objective was to assess whether cortical bone in the femoral neck assessed by MRI was associated with failure load in a simulated sideways fall, with and without adjustment for total bone size. Our secondary objective was to assess the reliability of the MRI measurements.
Materials and methods We imaged 34 human cadaveric proximal femora using MRI and dual-energy X-ray absorptiometry (DXA). MRI measurements of cross-sectional geometry at the femoral neck were the cortical cross-sectional area (CoCSAMRI), second area moment of inertia (x axis; IxMRI), and section modulus (x axis; ZxMRI). DXA images were analyzed with the standard Hologic protocol. From DXA, we report the areal bone mineral density (aBMDDXA) in the femoral neck and trochanteric subregions of interest. The femora were loaded to failure at 100 mm/s in a sideways fall configuration (15° internal rotation, 10° adduction).
Results and observations Failure load (N) was the primary outcome. We observed that the femoral neck CoCSAMRI and IxMRI were strongly associated with failure load (r 2=0.46 and 0.48, respectively). These associations were similar to those between femoral neck aBMD and failure load (r 2=0.40), but lower than the associations between trochanteric aBMD and failure load (r 2=0.70).
Conclusion We report that MRI holds considerable promise for measuring cortical bone geometry in the femoral neck and for predicting strength at the proximal femur.
Keyword Cortical bone
Cross-sectional geometry
DXA
Failure load
Hip fracture
MRI
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Human Movement and Nutrition Sciences Publications
 
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