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- W1574617868 abstract "Purpose To develop a Fourier‐transform based velocity‐selective (VS) pulse train that offers improved robustness to B0/B1 inhomogeneity for non‐contrast‐enhanced cerebral MR angiography (MRA) at 3 Tesla (T). Methods VS pulse train I and II with different saturation bands are proposed to incorporate paired and phase cycled refocusing pulses. Their sensitivity to B0/B1 inhomogeneity was estimated through simulation and compared with a single refocused VS pulse train. The implementation was compared to standard time of flight (TOF) among eight healthy subjects. Results In contrast to single refocused VS pulse train, the simulated VS profiles from proposed pulse trains indicate much improved immunity to field inhomogeneity in the brain at 3T. Successive application of two identical VS pulse trains yields a better suppression of static tissue at the cost of 20∼30% signal loss within large vessels. Average relative contrast ratios of major cerebral arterial segments applying both pulse train I and II with two preparations are 0.81 ± 0.06 and 0.81 ± 0.05, respectively, significantly higher than 0.67 ± 0.07 of TOF‐MRA. VS MRA, in particular, the pulse train II with the narrower saturation band, depicts more small vessels with slower flow. Conclusion VS magnetization‐prepared cerebral MRA was demonstrated among normal subjects on a 3T scanner. Magn Reson Med 75:1232–1241, 2016. © 2015 Wiley Periodicals, Inc." @default.
- W1574617868 created "2016-06-24" @default.
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- W1574617868 date "2015-05-02" @default.
- W1574617868 modified "2023-10-10" @default.
- W1574617868 title "Velocity‐selective magnetization‐prepared non‐contrast‐enhanced cerebral MR angiography at 3 Tesla: Improved immunity to B0/B1 inhomogeneity" @default.
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- W1574617868 doi "https://doi.org/10.1002/mrm.25764" @default.
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