To obtain vessel architectural imaging (VAI), a dual gradient-echo/spin-echo EPI sequence is needed to simultaneously track the dynamic signal changes in both gradient echo and spin echo contrasts. However, brain coverage and in-plane matrix size in previous brain studies were limited. In this study, the multiband excitation and blipped-CAIPI techniques were applied to improve the slice coverage. To enhance the in-plane resolution, two rephasing gradients were inserted after the GE readout, to return the data acquisition to the k-space center before the SE readout and enable parallel imaging techniques.
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