Optimized transmit pulses for excellent whole-brain excitation homogeneity in high field MRI

Shao, Tingting, Xia, Ling, Liu, Feng and Crozier, Stuart (2012). Optimized transmit pulses for excellent whole-brain excitation homogeneity in high field MRI. In: 20th Annual Meeting of the International Society for Magnetic Resonance in Medicine (ISMRM), Melbourne, Australia, (). 5-11 May 2012.

Author Shao, Tingting
Xia, Ling
Liu, Feng
Crozier, Stuart
Title of paper Optimized transmit pulses for excellent whole-brain excitation homogeneity in high field MRI
Conference name 20th Annual Meeting of the International Society for Magnetic Resonance in Medicine (ISMRM)
Conference location Melbourne, Australia
Conference dates 5-11 May 2012
Publication Year 2012
Sub-type Poster
Language eng
Abstract/Summary This work presents a novel approach for designing RF pulses to achieve excellent whole-brain excitation homogeneity in high field MRI. Based on the parallel transmission technology, an optimized 3D tailored RF (TRF) pulse has been proposed to account for the severe RF(B1) inhomogeneity at 11.7T. The pulse is designed with an adaptive stack-spiral trajectory tailored according to the trajectory container, whose interior is mostly responsible for the desired excitation pattern. An iterative RF pulse design method is employed to ensure the excitation accuracy. Test simulations show that the proposed scheme provides homogeneous excitation over the entire brain volume in spite of the inhomogeneous field and insufficient longitudinal coverage.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Electronic Poster Session - Pulse Sequences & Reconstruction A: Susceptibility & RF Pulses - Poster 3457.

 
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Created: Fri, 12 Apr 2013, 15:19:45 EST by Ms Kimberley Nunes on behalf of Centre for Medical Diagnostic Technologies in Qld