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The PRESTO technique for fMRI.

Abstract：

:In the early days of BOLD fMRI, the acquisition of T(2)(*) weighted data was greatly facilitated by rapid scan techniques such as EPI. The latter, however, was only available on a few MRI systems that were equipped with specialized hardware that allowed rapid switching of the imaging gradients. For this reason, soon after the invention of fMRI, the scan technique PRESTO was developed to make rapid T(2)(*) weighted scanning available on standard clinical scanners. This method combined echo shifting, which allows for echo times longer than the sequence repetition time, with acquisition of multiple k-space lines per excitation. These two concepts were combined in order to achieve a method fast enough for fMRI, while maintaining a sufficiently long echo time for optimal contrast. PRESTO has been primarily used for 3D scanning, which minimized the contribution of large vessels due to inflow effects. Although PRESTO is still being used today, its appeal has lessened somewhat due to increased gradient performance of modern MRI scanners. Compared to 2D EPI, PRESTO may have somewhat reduced temporal stability, which is a disadvantage for fMRI that may not outweigh the advantage of reduced inflow effects provided by 3D scanning. In this overview, the history of the development of the PRESTO is presented, followed by a qualitative comparison with EPI.

journal_name

Neuroimage

journal_title

NeuroImage

authors

van Gelderen P,Duyn JH,Ramsey NF,Liu G,Moonen CT

doi

10.1016/j.neuroimage.2012.01.017

subject

Has Abstract

pub_date

2012-08-15 00:00:00

pages

676-81

issue

2

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(12)00034-1

journal_volume

62

pub_type

历史文章,杂志文章,评审

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