Half-Fourier single-shot STEAM MRI.
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Half-Fourier single-shot STEAM MRI. / Finsterbusch, Jürgen; Frahm, Jens.
In: MAGN RESON MED, Vol. 47, No. 3, 3, 2002, p. 611-615.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Half-Fourier single-shot STEAM MRI.
AU - Finsterbusch, Jürgen
AU - Frahm, Jens
PY - 2002
Y1 - 2002
N2 - 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.
AB - 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.
M3 - SCORING: Zeitschriftenaufsatz
VL - 47
SP - 611
EP - 615
JO - MAGN RESON MED
JF - MAGN RESON MED
SN - 0740-3194
IS - 3
M1 - 3
ER -
