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• W2014967884 abstract "Objectives The purpose of this study was to systematically assess the optimal b-value and reconstruction parameters for DTI and fiber tractography of the median nerve at 3.0 T. Methods Local ethical board approved study with 45 healthy volunteers (15 men, 30 women; mean age, 41 ± 3.4 years) who underwent DTI of the right wrist at 3.0 T. A single-shot echo-planar-imaging sequence (TR/TE 10123/40 ms) was acquired at four different b-values (800, 1000, 1200, and 1400 s/mm2). Two independent readers performed post processing and fiber-tractography. Fractional anisotropy (FA) maps were calculated. Fiber tracts of the median nerve were generated using four different algorithms containing different FA thresholds and different angulation tolerances. Data were evaluated quantitatively and qualitatively. Results Tracking algorithms using a minimum FA threshold of 0.2 and a maximum angulation of 10° were significantly better than other algorithms. Fiber tractography generated significantly longer fibers in DTI acquisitions with higher b-values (1200 and 1400 s/mm2 versus 800 s/mm2; p < 0.001). The overall quality of fiber tractography was best at a b-value of 1200 s/mm2 (p < 0.001). Conclusions In conclusion, our results indicate use of b-values between 1000 and 1400 s/mm2 for DTI of the median nerve at 3.0 T. Optimal reconstruction parameters for fiber tractography should encompass a minimum FA threshold of 0.2 and a maximum angulation tolerance of 10." @default.
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• W2014967884 date "2012-07-01" @default.
• W2014967884 modified "2023-09-23" @default.
• W2014967884 title "MR neurography of the median nerve at 3.0T: Optimization of diffusion tensor imaging and fiber tractography" @default.
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• W2014967884 doi "https://doi.org/10.1016/j.ejrad.2012.03.017" @default.
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