期刊
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
卷 27, 期 4, 页码 339-347出版社
SPRINGER
DOI: 10.1007/s10334-013-0418-z
关键词
Quadriceps muscle; Cross-sectional anatomy; Muscle strength; Longitudinal studies; Sensitivity
资金
- Osteoarthritis Initiative (OAI)
- National Institutes of Health, a branch of the Department of Health and Human Services [N01-AR-2-2258, N01-AR-2-2259, N01-AR-2-2260, N01-AR-2-2261, N01-AR-2-2262]
- Pfizer, Inc.
- Novartis Pharmaceuticals Corporation
- Merck Research Laboratories
- GlaxoSmithKline
- Paracelsus Medical University Forschungsfond [R-10-02-014-WIRTH]
Biomechanical measurement of muscle strength represents established technology in evaluating limb function. Yet, analysis of longitudinal change suffers from relatively large between-measurement variability. Here, we determine the sensitivity to change of magnetic resonance imaging (MRI)-based measurement of thigh muscle anatomical cross sectional areas (ACSAs) versus isometric strength in limbs with and without structural progressive knee osteoarthritis (KOA), with focus on the quadriceps. Of 625 Osteoarthritis Initiative participants with radiographic KOA, 20 had MRI cartilage and radiographic joint space width loss in the right knee isometric muscle strength measurement and axial T1-weighted spin-echo acquisitions of the thigh. Muscle ACSAs were determined from manual segmentation at 33 % femoral length (distal to proximal). In progressor knees, the reduction in quadriceps ACSA between baseline and 2-year follow-up was -2.8 +/- A 7.9 % (standardized response mean [SRM] = -0.35), and it was -1.8 +/- A 6.8 % (SRM = -0.26) in matched, non-progressive KOA controls. The decline in extensor strength was more variable than that in ACSAs, both in progressors (-3.9 +/- A 20 %; SRM = -0.20) and in non-progressive controls (-4.5 +/- A 28 %; SRM = -0.16). MRI-based analysis of quadriceps muscles ACSAs appears to be more sensitive to longitudinal change than isometric extensor strength and is suggestive of greater loss in limbs with structurally progressive KOA than in non-progressive controls.
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