What does this research mean for the field?

Ultrasonography provides a reliable and accurate assessment of structural alterations in knee osteoarthritis, demonstrating strong agreement with MRI for evaluating joint effusion, osteophytes, and meniscal extrusion. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the concordance and diagnostic agreement between ultrasonography and MRI in identifying structural joint features of knee osteoarthritis.

August 30, 2026BMC Musculoskeletal DisordersOpen Access

Assessing the concordance between ultrasonography and MRI for evaluation of structural features in knee osteoarthritis: a prospective cross-sectional study

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Authors

HMHadi MajidiImam Khomeini Hospital SSShima SharifiImam Khomeini Hospital FRFatemeh Niksolat RoodposhtiMazandaran University of Medical Sciences

Discussion

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Implication

Prospective cross-sectional study demonstrates high concordance between ultrasound and MRI in knee osteoarthritis, suggesting ultrasound is an accurate alternative for joint assessment.

Key Points

To evaluate the concordance and diagnostic agreement between ultrasonography and MRI in identifying structural joint features of knee osteoarthritis.
Prospective cross-sectional study of 320 patients fulfilling American College of Rheumatology criteria for knee osteoarthritis who underwent standardized knee ultrasonography and MRI.
Assessed cartilage integrity, meniscal extrusion, marginal osteophytes, and joint effusion, using MRI as the diagnostic reference standard.
Analyzed agreement and accuracy using Cohen’s kappa, Spearman correlation, intraclass correlation coefficients (ICC), and Bland–Altman plots.
Agreement between ultrasonography and MRI was substantial for osteophytes (κ = 0.79), moderate-to-good for meniscal extrusion (κ = 0.52–0.72) and joint effusion (κ = 0.67), and moderate for cartilage grading (κ = 0.52).
Ultrasonography showed high diagnostic performance for joint effusion (sensitivity = 98.7%, specificity = 100%) and strong correlation for quantitative meniscal extrusion (ρ = 0.79–0.96; ICC = 0.84–0.93, 95% CI: 0.600–0.957).
Bland–Altman analysis demonstrated minimal measurement bias and narrow limits of agreement between ultrasonography and MRI measurements.

Cite This Study

Majidi et al. (2026) studied this question.

synapsesocial.com/papers/6a93f1396c1a8fb52e79e02e https://doi.org/10.1186/s12891-026-10394-y

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Implication

Prospective cross-sectional study demonstrates high concordance between ultrasound and MRI in knee osteoarthritis, suggesting ultrasound is an accurate alternative for joint assessment.

Assessing the concordance between ultrasonography and MRI for evaluation of structural features in knee osteoarthritis: a prospective cross-sectional study

Discussion

Member takes

Implication

Key Points

Cite This Study

Assessing the concordance between ultrasonography and MRI for evaluation of structural features in knee osteoarthritis: a prospective cross-sectional study

Discussion

Member takes

Implication

Key Points

Cite This Study

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