University of Oulu

Kauppinen, K., Casula, V., Zbýň, Š., Blanco Sequeiros, R., Saarakkala, S. S., & Nevalainen, M. T. (2021). Ultrasonographic assessment of the normal femoral articular cartilage of the knee joint: Comparison with 3D MRI. The Scientific World Journal, 2021, 1–6.

Ultrasonographic assessment of the normal femoral articular cartilage of the knee joint : comparison with 3D MRI

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Author: Kauppinen, Kyösti1,2,3; Casula, Victor1,2; Zbýň, Štefan2,4;
Organizations: 1Medical Research Center Oulu, University of Oulu, P.O. Box 8000, Oulu, Finland
2Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, P.O. Box 5000, FI-90014 Oulu, Finland
3Department of Radiology, Turku University Hospital, P.O. Box 52, 20521 Turku, Finland
4Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, 6th St SE, Minneapolis, MN 55455, USA
5Department of Diagnostic Radiology, Oulu University Hospital, P.O. Box 50, 90029 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2 MB)
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Language: English
Published: Hindawi, 2021
Publish Date: 2022-01-17


Objective: Ultrasonography (US) has a promising role in evaluating the knee joint, but capability to visualize the femoral articular cartilage needs systematic evaluation. We measured the extent of this acoustic window by comparing standardized US images with the corresponding MRI views of the femoral cartilage.

Design: Ten healthy volunteers without knee pathology underwent systematic US and MRI evaluation of both knees. The femoral cartilage was assessed on the oblique transverse axial plane with US and with 3D MRI. The acoustic window on US was compared to the corresponding views of the femoral sulcus and both condyles on MRI. The mean imaging coverage of the femoral cartilage and the cartilage thickness measurements on US and MRI were compared.

Results: Mean imaging coverage of the cartilage of the medial femoral condyle was 66% (range 54%–80%) and on the lateral femoral condyle 37% (range 25%–51%) compared with MRI. Mean cartilage thickness measurement in the femoral sulcus was 3.17 mm with US and 3.61 mm with MRI (14.0% difference). The corresponding measurements in the medial femoral condyle were 1.95 mm with US and 2.35 mm with MRI (21.0% difference), and in the lateral femoral condyle, they were 2.17 mm and 2.73 mm (25.6% difference), respectively.

Conclusion: Two-thirds of the articular cartilage of the medial femoral condyle, and one-third in the lateral femoral condyle, can be assessed with US. The cartilage thickness measurements seem to be underestimated by US. These results show promise for the evaluation of the weight-bearing cartilage of the medial femoral condyle with US.

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Series: Scientific world journal
ISSN: 2356-6140
ISSN-E: 1537-744X
ISSN-L: 2356-6140
Volume: 2021
Article number: 9978819
DOI: 10.1155/2021/9978819
Type of Publication: A1 Journal article – refereed
Field of Science: 3126 Surgery, anesthesiology, intensive care, radiology
Copyright information: © 2021 Kyösti Kauppinen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.