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Related Experiment Video

Updated: May 27, 2026

An Experimental and Finite Element Protocol to Investigate the Transport of Neutral and Charged Solutes across Articular Cartilage
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Articular cartilage: in vivo diffusion-tensor imaging.

José G Raya1, Annie Horng, Olaf Dietrich

  • 1Department of Radiology, New York University Langone Medical Center, 660 First Ave, 4th Floor, New York, NY 10016, USA. jose.raya@nyumc.org

Radiology
|November 23, 2011
PubMed
Summary
This summary is machine-generated.

Diffusion-tensor imaging (DTI) parameters, including apparent diffusion coefficient (ADC) and fractional anisotropy (FA), show promise for detecting early osteoarthritis (OA). These advanced MRI techniques offer reliable reproducibility and can differentiate healthy individuals from those with OA.

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Area of Science:

  • Biomedical Imaging
  • Radiology
  • Orthopedics

Background:

  • Osteoarthritis (OA) is a degenerative joint disease affecting cartilage.
  • Early detection of OA is crucial for effective management.
  • Current diagnostic methods may not identify subtle cartilage changes in early stages.

Purpose of the Study:

  • To assess the feasibility and reproducibility of diffusion-tensor imaging (DTI) parameters and T2 relaxation time for patellar cartilage.
  • To determine if these imaging parameters can differentiate between healthy subjects and those with early OA.
  • To identify potential imaging biomarkers for early OA detection.

Main Methods:

  • High-resolution (7.0 T) DTI and T2 mapping of patellar cartilage were performed on healthy volunteers and patients with early OA.
  • Apparent diffusion coefficient (ADC), fractional anisotropy (FA), and T2 relaxation time were calculated.
  • Test-retest reproducibility was evaluated, and receiver operating characteristic (ROC) curve analysis was used to assess differentiation capabilities.

Main Results:

  • DTI parameters (ADC and FA) demonstrated significant differences between healthy and OA groups (P<.01).
  • ADC and FA showed good test-retest reproducibility (8.1% and 9.7%, respectively).
  • ADC and FA achieved high sensitivity (80%) and specificity (100% and 88%, respectively) in differentiating OA from healthy subjects.

Conclusions:

  • In vivo DTI of patellar cartilage is technically feasible and reproducible.
  • ADC and FA are promising quantitative biomarkers for the early detection of OA.
  • These DTI parameters show potential for accurate discrimination between healthy and early OA populations.