Journal article
Adaptations in trabecular bone microarchitecture in Olympic athletes determined by 7T MRI
Journal of magnetic resonance imaging, Vol.27(5), pp.1089-1095
05/2008
DOI: 10.1002/jmri.21326
PMCID: PMC3850284
PMID: 18425824
Abstract
To produce in vivo high-resolution images of the knee and to determine the feasibility of using 7T MR to detect changes in trabecular bone microarchitecture in elite athletes (Olympic fencers) who undergo high impact activity.
The dominant knees of four males from the U.S. Olympic Fencing Team and three matched healthy male controls were scanned in a 7T whole-body scanner using a quadrature knee coil with three-dimensional (3D) fast low angle shot (FLASH): 50 axial images at the distal femur (0.156 mm x 0.156 mm) and 80 axial images at the knee joint (0.195 mm x 0.195 mm). Bone volume fraction (BVF) and marrow volume fraction (MVF) images were computed and fuzzy distance transform (FDT) and digital topological analysis (DTA) were applied to determine: trabecular number (Tb.N), trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp); BVF (BV/TV); trabecular and marrow space surface-to-curve ratio (SC, marker of plate to rod ratio); and trabecular and marrow space erosion index (EI, inverse marker for network connectivity). Quadriceps muscle volume (MV) was calculated as well. We calculated group means and performed two-tailed t-tests to determine statistical significance.
Compared to controls, fencers had: decreased Tb.Sp (P = 0.0082 at femur, P = 0.051 at joint); increased Tb.N (P < 0.05 at both femur and joint) and BV/TV (P < 0.001 at both femur and joint); increased trabecular SC and decreased marrow space SC (P < 0.01 at both femur and joint); decreased trabecular EI and increased marrow space EI (P < 0.01 at both femur and joint); and increased MV (P = 0.038). There was no difference in Tb.Th at the distal femur (P = 0.92) or joint (P = 0.71) between groups.
To our knowledge, this is the first study to perform 7T MRI of the knee in vivo. Elite athletes who undergo high impact activity have increased MV and improved trabecular bone structure compared to controls.
Details
- Title: Subtitle
- Adaptations in trabecular bone microarchitecture in Olympic athletes determined by 7T MRI
- Creators
- Gregory Chang - Center for Biomedical Imaging, Department of Radiology, NYU School of Medicine, Hospital for Joint Disease, New York, New York 10003, USA, USA. changg02@med.nyu.eduS Kubilay PakinMark E SchweitzerPunam K SahaRavinder R Regatte
- Resource Type
- Journal article
- Publication Details
- Journal of magnetic resonance imaging, Vol.27(5), pp.1089-1095
- Publisher
- United States
- DOI
- 10.1002/jmri.21326
- PMID
- 18425824
- PMCID
- PMC3850284
- ISSN
- 1053-1807
- eISSN
- 1522-2586
- Grant note
- R01 AR053133 / NIAMS NIH HHS R01-AR053133-A2 / NIAMS NIH HHS R01 AR056260 / NIAMS NIH HHS
- Language
- English
- Date published
- 05/2008
- Academic Unit
- Radiology; Electrical and Computer Engineering
- Record Identifier
- 9984051547902771
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