Abstract #1884

Spatiotemporally encoded anatomical shape in-plane excitation with reduced profile distortion from field inhomogeneity

Ying Chen¹, Song Chen¹, Zhong Chen², and Jianhui Zhong^1,3

¹Center for Brain Imaging Science and Technology, Zhejiang University, Hangzhou, China, People's Republic of, ²Department of Electronic Science, Xiamen University, Xiamen, China, People's Republic of, ³Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, China, People's Republic of

In-plane reduced field-of-view excitation based on two-dimensional radio-frequency pulse (2DRF) has been widely used in many applications. The EPI-style gradient waveform is commonly used in 2DRF implementation. However, at high field, the off-resonance effects during excitation would result in distortions of the profiles obtained. This work is to investigate the feasibility to achieve in-plane selective excitation of anatomically pre-defined regions using SPEN-2DRF pulse under different shim conditions. Experimental results show that the proposed method can produce profiles with significantly improved robustness to distortions at high field than the Fourier-based 2DRF pulse.

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