Abstract #0935

Phase-Contrast MRI with Hybrid One- and Two-sided Simultaneous Three Directional Flow-Encoding and Velocity SPectrum SepAration (HOTSPA+)

Wenjian Liu¹, Junpu Hu², Jiayu Zhu², Jian Xu³, Zijian Zhou¹, Haikun Qi^1,4, and Peng Hu^1,4

¹School of Biomedical Engineering, ShanghaiTech University, Shanghai, China, ²United Imaging Healthcare, Shanghai, China, ³UIH America, Inc., Houston, TX, United States, ⁴Shanghai Clinical Research and Trial Center, ShanghaiTech University, Shanghai, China

Synopsis

Keywords: Flow, Velocity & FlowPhase contrast MRI (PC MRI) has been widely used to quantify blood flow and velocity. Four-dimensional (4D) flow PC MRI needs to acquire the FC data and three-directional (3D) FE data interleaved within each cardiac k-space segment. In this work, we propose a more efficient flow encoding strategy for PC MRI using a temporal modulation technique and we showed the preliminary feasibility of quadrupling the temporal resolution or reducing the scan time by 70% compared with conventional 4D flow by redesigning and adjusting the temporal modulation strategy for under-sampled M1 space.

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