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Materials 2011, 4(11), 1941-1955;

Advances in High-Field BOLD fMRI

Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, Nijmegen 6525 HP, The Netherlands
Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen 45141, Germany
Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96785, USA
Author to whom correspondence should be addressed.
Received: 16 August 2011 / Revised: 7 October 2011 / Accepted: 19 October 2011 / Published: 2 November 2011
(This article belongs to the Special Issue High Field Magnetic Resonance Methods and Materials)
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This review article examines the current state of BOLD fMRI at a high magnetic field strength of 7 Tesla. The following aspects are covered: a short description of the BOLD contrast, spatial and temporal resolution, BOLD sensitivity, localization and spatial specificity, technical challenges as well as an outlook on future developments are given. It is shown that the main technical challenges of performing BOLD fMRI at high magnetic field strengths—namely development of array coils, imaging sequences and parallel imaging reconstruction—have been solved successfully. The combination of these developments has lead to the availability of high-resolution BOLD fMRI protocols that are able to cover the whole brain with a repetition time (TR) shorter than 3 s. The structural information available from these high-resolution fMRI images itself is already very detailed, which helps to co-localize structure and function. Potential future applications include whole-brain connectivity analysis on a laminar resolution and single subject examinations. View Full-Text
Keywords: BOLD fMRI; high field; 7 Tesla; BOLD response; 2D EPI; 3D EPI BOLD fMRI; high field; 7 Tesla; BOLD response; 2D EPI; 3D EPI

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Barth, M.; Poser, B.A. Advances in High-Field BOLD fMRI. Materials 2011, 4, 1941-1955.

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