Evaluation of spiral acquisition variants for functional imaging of human superior colliculus at 3T field strength.

ABSTRACT:

Purpose

High-resolution functional magnetic resonance imaging of human subcortical brain structures is challenging because of their deep location in the cranium, and their comparatively weak blood oxygen level dependent responses to strong stimuli. Magnetic resonance imaging data for subcortical brain regions exhibit both low signal-to-noise ratio and low functional contrast-to-noise ratio. To overcome these challenges, this work evaluates the use of dual-echo spiral variants that combine outward and inward trajectories. Specifically, in-in, in-out, and out-out combinations are evaluated. For completeness, single-echo spiral-in and parallel-receive-accelerated echo-planar-imaging sequences are also evaluated.

Methods

Sequence evaluation was based on comparison of functional

SUBMITTER: Singh V 

PROVIDER: S-EPMC5783788 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature