Document Type

Conference Proceeding

Language

eng

Publication Date

5-2010

Publisher

International Society for Magnetic Resonance in Medicine

Source Publication

Proceedings of the International Society for Magnetic Resonance in Medicine Scientific Meeting and Exhibition

Source ISSN

1545-4428

Abstract

Multi-echo-time echo planar image acquisitions allow for the consideration of BOLD related T2* decay. Studies which have included single-shot, multi-echo acquisitions to calculate T2* have been shown to yield activations which are appropriately localized when compared to proton spin density images calculated from the same T2* weighted images (1), allowing the separation of BOLD T2* effects from other effects which arise in the proton spin density images. However, such pulse sequences require the acquisition of additional data in each shot, reducing the available slice coverage for a given TR. In this abstract, we present a method for the statistical analysis of multi-echo time fMRI data, and apply it to data acquired in a pulse sequence where the echo time is shifted by 20 ms for alternating TRs, thereby allowing the same slice coverage as standard, single echo data acquisitions.

Comments

Published version. Published as part of the proceedings of the conference, Proceedings of the 18th Annual International Society for Magnetic Resonance in Medicine Scientific Meeting and Exhibition,2010. Publisher link. © 2010 International Society for Magnetic Resonance in Medicine. Used with permission.

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