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• W1991883923 abstract "Background: Patellofemoral pain (PFP) is a common condition and often presents without evidence of arthritis on radiographs. Magnetic resonance imaging (MRI) has shown good correlation between T 1ρ and T 2 relaxation times and changes in the cartilage matrix, but as of yet, there are limited data in the literature utilizing these modalities to evaluate the patellofemoral joint. Hypothesis: Patients with PFP and patellar tilt will show longer T 1ρ relaxation times in the lateral facets of their patella but no difference in T 2 values. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 20 patients aged 18 to 45 years with anterior knee pain, patellar tilt, and no evidence of osteoarthritis were identified and consented to undergo MRI including axial T 1ρ and T 2 relaxation time mapping sequences. Knee cartilage was segmented on spoiled gradient recalled acquisition in steady state (SPGR) images using a spline-based algorithm. These results were then compared with those of 10 age-matched controls. Results: The mean T 1ρ values of the lateral facets were significantly elevated in patients with PFP compared with controls (46.33 ± 4.92 ms vs 42.32 ± 3.67 ms, respectively; P = .031), while no significant difference was observed in the medial facets (42.20 ± 5.55 ms vs 41.42 ± 4.09 ms, respectively; P = .69). Significantly higher mean T 1ρ values were noted in the lateral facets of the patients with PFP (46.33 ms) compared with the medial facets (42.20 ms) ( P = .0001), while no significant differences in T 1ρ values were observed between the medial and lateral facets of the controls ( P = .502). No significant differences were noted in T 2 relaxation times. A high correlation was noted between the mean T 1ρ values of the whole patella of patients with PFP and the degree of patellar tilt ( r = 0.72). Conclusion: There were significantly higher T 1ρ values in the lateral facets of patients with PFP and patellar tilt that were not seen in control patients. These higher values approach the numbers seen in patients with early osteoarthritis." @default.
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• W1991883923 date "2013-07-11" @default.
• W1991883923 modified "2023-10-03" @default.
• W1991883923 title "T_1ρ Imaging Demonstrates Early Changes in the Lateral Patella in Patients With Patellofemoral Pain and Maltracking" @default.
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• W1991883923 doi "https://doi.org/10.1177/0363546513495167" @default.
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