Meeting Banner
Abstract #4236

Rapid and Tissue Specific Susceptibility Imaging with Multi-Echo Multi-Shot EPI Acquisition

Bing Wu1, Wei Li2, Nankuei Chen2, Chunlei Liu2

1GE heathcare, Beijing, China; 2Brain Imaging and analysis center, Duke University

Susceptibility imaging with standard SPGR is a considerably long imaging process which limits its clinical feasibility. Spiral acquisition has been proposed as an alternative to achieve rapid susceptibility imaging. However, spiral trajectory places demanding requirements on the gradient system and is not usually available on commercial scanners. In addition, spiral trajectory is very sensitive to susceptibility distortions. In this work, a multi-echo multi-shot EPI sequence is implemented and used for susceptibility imaging. The result shows that, given the same acquisition time, EPI leads to a susceptibility map with less distortion compared to that of spiral acquisition.

Abstract PDF E-Poster Video

Keywords

able accurate achieve acquisition acquisitions addition adult advantage allows another arrowed artifacts assessed availability available axial barely bench best bing blurring boundary brain channel china close coil commercial composition considerably conventionally correction covering cycling dataset deep degraded delineation demanding derived described despite distortion distortions downside drawback duke echoes employed employing equipped fast features field fits former give gradient gradients head healthy identical implemented improve improved in vivo individual inhomogeneity instead isotropic leads long made make mapping maps mark matrix minutes much nature noticeable nuclei object often otherwise overall partial people plot plotted potentially preliminary process processed proposed quantitative quantitatively quite rapid read readout reconstruction related republic requirement resolution sampling scanner scanners scatter self sensitive sensitivity setup short shorter shot shots slice slightly space spacing spiral stack substitute sufficiently suitable susceptibility taking tissue types usually utilize variation vendors visually volume volunteer wide widely