The effect of spiral trajectory correction on pseudo-continuous arterial spin labeling with high-performance gradients on a compact 3T scanner.

ABSTRACT:

Purpose

To demonstrate the feasibility of pseudo-continuous arterial-spin-labeled (pCASL) imaging with 3D fast-spin-echo stack-of-spirals on a compact 3T scanner (C3T), to perform trajectory correction for eddy-current-induced deviations in the spiral readout of pCASL imaging, and to assess the correction effect on perfusion-related images with high-performance gradients (80 mT/m, 700T/m/s) of the C3T.

Methods

To track eddy-current-induced artifacts with Archimedean spiral readout, the spiral readout in pCASL imaging was performed with 5 different peak gradient slew rate (S_max ) values ranging from 70 to 500 T/m/s. The trajectory for each S_max was measured using a dynamic field camera and applied in a density-compensated gridding image reconstruction in

SUBMITTER: Kang D 

PROVIDER: S-EPMC7083700 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature