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Issue date 2021 May. To realize extremely accelerated sub-millimeter decision T2-weighted purposeful MRI at 7T by growing a 3-dimensional gradient and spin echo imaging (GRASE) with interior-quantity choice and variable flip angles (VFA). GRASE imaging has disadvantages in that 1) ok-area modulation causes T2 blurring by limiting the number of slices and 2) a VFA scheme results in partial success with substantial SNR loss. On this work, accelerated GRASE with managed T2 blurring is developed to enhance some extent unfold function (PSF) and temporal sign-to-noise ratio (tSNR) with a large number of slices. Numerical and experimental research were carried out to validate the effectiveness of the proposed technique over common and VFA GRASE (R- and V-GRASE). The proposed method, while reaching 0.8mm isotropic resolution, practical MRI compared to R- and V-GRASE improves the spatial extent of the excited quantity as much as 36 slices with 52% to 68% full width at half maximum (FWHM) reduction in PSF but approximately 2- to 3-fold imply tSNR enchancment, thus resulting in higher Bold activations.
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