Abstract #0954
High Resolution DTI using Dual-density Spiral for Efficient Sampling and Reduced Off-resonance Artifacts
Xiaodong Ma 1 , Zhe Zhang 1 , Hui Zhang 1 , Bida Zhang 2 , Sheng Fang 3 , and Hua Guo 1
1
Center for Biomedical Imaging Research,
Department of Biomedical Engineering, School of
Medicine, Tsinghua University, Beijing, China,
2
Healthcare
Department, Philips Research China, Shanghai, China,
3
Institute
of nuclear and new energy technology, Tsinghua
University, Beijing, China
While variable density spiral (VDS) has been used to
generate high resolution diffusion tensor imaging, it
has low sampling efficiency and severe off-resonance
artifacts caused by prolonged readout duration. To solve
this, a more efficient trajectory, dual-density spiral
(DDS), was proposed to replace VDS in DTI. In vivo
results show that DDS can improve the sampling
efficiency and reduce off-resonance blurring compared to
VDS. Besides, it can correct the motion-induced phase
errors more effectively since a larger full-sampling
region and thus higher resolution navigator can be
provided.
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