Half-Fourier single-shot STEAM MRI

Finsterbusch, J.; Frahm, J.

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Half-Fourier single-shot STEAM MRI

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Finsterbusch, J.
Biomedical NMR Research GmbH, MPI for biophysical chemistry, Max Planck Society;

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Finsterbusch, J., & Frahm, J. (2002). Half-Fourier single-shot STEAM MRI. Magnetic Resonance in Medicine, 47(3), 611-615. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/mrm.10090/pdf.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0012-F436-E

Abstract

As a high-speed imaging technique based on stimulated echoes single-shot STEAM MRI is insensitive to chemical shift artifacts and magnetic susceptibility differences. The achievable signal-to-noise ratio (SNR) is limited by the fact that high flip angles of the read-out excitation pulses cause a steep decay of the stimulated echo train and therefore degrade the point-spread function of the resulting image. The present work investigates the use of half-Fourier phase encoding which weakens the flip angle constraint by reducing the number of necessary excitations. Single-shot STEAM MRI of the normal human brain at 2.0 T demonstrates that half-Fourier versions either reduce the measurement time by almost a factor of two without sacrificing the SNR or increase the SNR by about 40% while keeping the measurement time constant. (C) 2002 Wiley- Liss, Inc.