An empirical investigation of the benefit of increasing the temporal resolution of task-evoked fMRI data with multi-band imaging.

ABSTRACT:

Objective

There is a tendency for reducing TR in MRI experiments with multi-band imaging. We empirically investigate its benefit for the group-level statistical outcome in task-evoked fMRI.

Methods

Three visual fMRI data sets were collected from 17 healthy adult participants. Multi-band acquisition helped vary the TR (2000/1000/410 ms, respectively). Because these data sets capture different temporal aspects of the haemodynamic response (HRF), we tested several HRF models. We computed a composite descriptive statistic, H, from β's of each first-level model fit and carried it to the group-level analysis. The number of activated voxels and the t value of the group-level analysis as well as a goodness-of-fit measure were used as surrogate markers of data quality for comparison.

SUBMITTER: Daranyi V 

PROVIDER: S-EPMC8421273 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature