Isotropic High-Resolution DIADEM-VAT at UHF

摘要

As multi-shot echo-planar imaging (EPI), DIADEM~([1,2]) was suggested for distortion-free imaging and combined with view-angle-tilting (VAT)[3] to further accelerate the scan time without any image blurring caused by the applied VAT gradient (G_(VAT)) in the reconstructed distortion-free image~([4]). However, the mechanism of signal-to-noise ratio (SNR) degradation in DIADEM data with VAT gradients and the application of thin slices, which demand high G_(VAT)~([3]),were not investigated yet. In this study, we performed high-resolution DIADEM-VAT scans with different slice thicknesses (i) to investigate how the GVAT attenuates the signal in the DIADEM-VAT acquisitions and (ii) to optimize the SNR for a thin slice acquisition.