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• W2207006462 abstract "Because compositional magnetic resonance imaging (MRI) techniques enable detection of biochemical and microstructural changes in the cartilage extracellular matrix before gross morphological changes occur, they may be useful as outcome measures for clinical trials focusing on early and potentially reversible disease stages1. To date, many of these compositional magnetic resonance imaging (MRI) techniques have not been thoroughly validated in human patients with osteoarthritis (OA) and thus are not presently in routine clinical use. Therefore compositional MRI techniques have rarely been applied in clinical trials2, but they have been used with increasing frequency in OA research for “premorphologic” evaluation of cartilage. Techniques comprise relaxometry measurements (T2, T2* and T1rho mapping) including T2* mapping with ultrashort echo-time imaging, sodium imaging, delayed gadolinium-enhanced MRI of cartilage (dGEMRIC), magnetization transfer contrast and glycosaminoglycan (GAG)-specific chemical exchange saturation transfer (gagCEST), diffusion-weighted imaging, and diffusion tensor imaging. Moreover, they seem to have the potential to serve as quantitative, reproducible, noninvasive, and objective endpoints for OA research, particularly in early and preradiographic stages of the disease. Table 1 summarizes available compositional MRI techniques in the context of OA research. Below we describe recent evidence regarding their potential utility. View this table: Table 1. Summary of compositional MRI techniques. Numerous clinical studies using T2 mapping have shown that subjects with knee pain have elevated T2 values3. Other studies have also associated T2 values with risk factors for OA including age, sex, obesity, and physical activity levels4. One study suggested that addition of a T2 mapping sequence to a routine MRI protocol at 3.0 T improved sensitivity in the detection of cartilage lesions in the knee joint, with only a slight reduction in specificity5. A more recent study showed that higher T2 values at baseline predicted disease onset in a cohort of subjects at … Address correspondence to Dr. A. Guermazi, Boston University School of Medicine, 820 Harrison Ave., FGH Building, 3rd Floor, Boston, Massachusetts 02118, USA; E-mail: guermazi{at}bu.edu" @default.
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• W2207006462 date "2016-01-01" @default.
• W2207006462 modified "2023-09-23" @default.
• W2207006462 title "Compositional Magnetic Resonance Imaging Measures of Cartilage — Endpoints for Clinical Trials of Disease-modifying Osteoarthritis Drugs?" @default.
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• W2207006462 doi "https://doi.org/10.3899/jrheum.150663" @default.
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