Improved signal-to-noise ratio in EPI sequences with highly asymmetric spin echo and highly asymmetric STEAM preparations (HASE-EPI and HASTEAM-EPI)

DiscussionIn contrast to commonly used SE-EPI or STEAM-EPI, the proposed sequences facilitate the acquisition of anatomical imaging and DWI data with improved SNR, especially for full EPI readouts. However, the applicability of HASE-EPI and HASTEAM-EPI should be carefully assessed: while signal gains are less pronounced when using parallel imaging and/or reduced matrix sizes, there may be pixel broadening for very long EPI-readout trains.
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - Category: Materials Science Source Type: research