Abstract #1180

Modified dual-contrast multi-shot 3D EPI for distortion-free and fast acquisition of simultaneous MR angiography and venography (DEPSAV)

Yue Wu^1,2,3, Dehe Weng⁴, Jing An⁴, Rong Xue^1,2,3, Yan Zhuo^1,2,3, and Zihao Zhang^1,2,5

¹State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, ²University of Chinese Academy of Sciences, Beijing, China, ³The Innovation Center of Excellence on Brain Science, Chinese Academy of Sciences, Beijing, China, ⁴Siemens Shenzhen Magnetic Resonance Ltd, Shenzhen, China, ⁵Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei, China

Synopsis

Keywords: Data Acquisition, BloodGRE-based vascular imaging suffers from the low acquisition efficiency. In this study, we presented a new 3D dual-contrast multishot-EPI based acquisition method called DESPAV for simultaneous MR angiography and venography. Full flow compensation for K-space center line and novel Center-out trajectory was implemented. A reconstruction pipeline was developed to correct for inter-shot phase errors, off-resonance induced artifact, and enable distortion-free multi-shot joint reconstruction. Preliminary results showed that DEPSAV can provide fast intracranial arterial and venous vasculature depiction with comparable contrast and image quality to 3D GRE-based TOF/SWI, while achieve ~3-fold reduction in acquisition time.

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