Meeting Banner
Abstract #1327

Squeezed Variable Density Spiral Trajectory for SAR Reduction in Parallel Transmission 2D RF Design

Qing Li1, Congyu Liao1, Huihui Ye1, Ying Chen1, Hongjian He1, Qiuping Ding1, and Jianhui Zhong1

1Center for Brain Imaging Science and Technology, Department of Biomedical Engineering, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China

A squeezed variable density spiral (SVDS) trajectory was proposed to reduce SAR and peak RF power in 2D RF pulse design using parallel transmission (pTX). SVDS was generated by applying a pointwise squeezing factor to conventional variable density spiral (CVDS) trajectory. Compared to CVDS, SVDS can reduce peak RF and SAR by close to 40%, with minimal increase in the normalized root mean square error (NRMSE) of the excitation profile and pulse duration.

This abstract and the presentation materials are available to members only; a login is required.

Join Here