Tiejun Zhao1, Hai Zheng2,
Yik-Kiong Hue3, Tamer Ibrahim,,3, Yongxian Qian3,
Fernando Boada2,3
1Siemens Medical Solutions,
Pittsburgh, PA, United States; 2Bioengineering, University of
Pittsburgh, Pittsburgh, PA, United States; 3Radiology, University
of Pittsburgh, Pittsburgh, PA, United States
Parallel transmission was recently proposed as one of the methods to accelerate multidimensional selective excitation using multiple coils driven with independent waveforms. The parallel excitation could be a potential solution for mitigating or solving the RF and SAR problems at the ultra-high field (e.g, 7T). One of the popular methods was proposed by Grissom et al. In this work, we propose two novel methods that the artifacts due to finite gradient raster step can be successfully compensated to avoid tilted and excitation errors. Significant improvement can be obviously seen from both simulations and experiments on 7T scanner.
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