Tripled Readout Slices in Multi Time-Point pCASL Using Multiband Look-Locker EPI

Tripled Readout Slices in Multi Time-Point pCASL Using Multiband Look-Locker EPI

Multi time-point pseudo-continuous arterial spin labelling (pCASL) with a Look-Locker EPI readout can sample the signal curve of blood kinetics at multiple time points after the labelling pulse. However, due to signal relaxation of labelled blood, the number of readout slices is limited. The aim of this study is to employ a multiband excitation technique to triple the number of readout slices i...

Whole Brain Perfusion Using Dynamic pCASL with Multiband Look-locker EPI

were reconstructed after 2-fold in-plane parallel imaging. Before and after using MB technique, the slice number was 6 and 18, respectively. Using MB excitation with an MB factor of 3 and blipped-CAIPI, three simultaneous excited slices were folded together with a phase shift. After reconstruction with the 'SliceGRAPPA' algorithm, the three folded slices were successfully separated and unaliase...

Tripled fixed point and tripled coincidence point theorems in intuitionistic fuzzy normed spaces

Fast T1 Mapping at 7T using Look-Locker TFEPI

INTRODUCTION: To monitor tracer kinetics in multiple sclerosis (MS) it is important to be able to measure longitudinal relaxation time, T1, at high spatial resolution with good coverage across the whole brain, and with high temporal resolution compared to the rate of uptake in lesions (~20-30 minutes [1]). LookLocker (LL) techniques provide a rapid method of measuring T1 by acquiring multiple r...

Multi-Shot, Diffusion-Weighted Imaging at 3T using Readout-Segmented EPI and GRAPPA

D. A. Porter, R. M. Heidemann MR Applications Development, Siemens Medical Solutions, Erlangen, Germany Introduction Diffusion-weighted, single-shot EPI suffers from considerable susceptibility-based distortion artefact at 3T. Although the effects can be mitigated by using a partially parallel imaging (PPA) technique to reduce the effective echo-spacing [1], there are significant residual artef...