T2 Relaxation Time Mapping of Proximal Tibiofibular Cartilage by 3-Tesla Magnetic Resonance Imaging

Background: The proximal tibiofibular joint (PTFJ) can be considered the fourth compartment of the knee joint. However, there have been no studies of the T2 values (T2 relaxation time) of PTFJ cartilage. Purpose: To assess the T2 values of PTFJ cartilage at 3T magnetic resonance imaging (MRI), and t...

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Bibliographic Details
Published in:Acta radiologica (1987) 2009-11, Vol.50 (9), p.1049-1056
Main Authors: Kwack, Kyu-Sung, Min, Byoung-Hyun, Cho, Jae Hyun, Kim, Jun Man, Yoon, Seung-Hyun, Kim, Sun Yong
Format: Article
Language:English
Subjects:
Analysis of Variance
Biological and medical sciences
Cartilage, Articular - pathology
Female
Fibula - pathology
Humans
Image Interpretation, Computer-Assisted
Investigative techniques, diagnostic techniques (general aspects)
Knee Joint - pathology
Magnetic Resonance Imaging - methods
Male
Medical sciences
Middle Aged
Osteoarthritis, Knee - diagnosis
Retrospective Studies
Tibia - pathology
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Summary:Background: The proximal tibiofibular joint (PTFJ) can be considered the fourth compartment of the knee joint. However, there have been no studies of the T2 values (T2 relaxation time) of PTFJ cartilage. Purpose: To assess the T2 values of PTFJ cartilage at 3T magnetic resonance imaging (MRI), and to show the clinical utility of T2 values of PTFJ cartilage for the diagnosis of osteoarthritis (OA). Material and Methods: 118 patients who had knee MR imaging and knee radiography were enrolled. MRI was performed using a 3T MRI scanner, and T2 maps were calculated from a sagittal multi-echo acquisition. Two regions of interest (ROIs) were positioned within PTFJ cartilage and medial femoral condyle (MFC) cartilage. The average T2 value and standard deviation (SD) of each ROI were recorded. Using PTFJ cartilage as a standard reference, the T2 index ((MFC/PTFJ)×100) and T2SD index ((MFCSD/PTFJSD)×100) were calculated. A paired t test was performed to compare the mean and SD of ROIs within PTFJ and MFC cartilage. Correlation analyses were performed among the parameters age, Kellgren-Lawrence (KL) score, means and SDs of ROIs within PTFJ and MFC cartilage, T2 index, and T2SD index. Results: PTFJ cartilage had a significantly shorter T2 value than did MFC cartilage (P
ISSN:0284-1851
1600-0455
DOI:10.3109/02841850903215918