Single-shot GRASE imaging with short effective TEs

Journal of Magnetic Resonance Imaging : JMRI
G JohnsonV Venkataraman

Abstract

A new phase-encoding scheme for gradient- and spin-echo (GRASE) imaging giving a short effective TE is described. Unlike previous orders, phase encoding is centric rather than sequential. The sequence is a development of k-banded GRASE that uses different time segments of the echo train to encode different bands of k space. This phase-encoding order has been implemented in single-shot sequences on an imager with high performance gradients. Approximately 144 phase-encoding lines can be acquired in an echo train time of 390 ms. With centric phase encoding, the effective TE is 8 ms, compared with 75 ms for sequential encoding, and signal-to-noise ratios (SNRs) in brain tissue are 50 to 70% higher. The sequence can be employed in, for example, diffusion and velocity imaging.

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Sep 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G JohnsonV Venkataraman

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Citations

Jun 22, 1999·European Journal of Radiology·Q ChenH Hatabu
Jul 29, 2010·NMR in Biomedicine·Bingwen ZhengXavier Golay
May 10, 2002·Neuroimaging Clinics of North America·Ryuta ItoElias R Melhem
Jun 11, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J Jovicich, D G Norris
Dec 13, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jürgen FinsterbuschMartin A Koch
May 20, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J Jovicich, D G Norris

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