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BOLD fMRI is widely applied in human neuroscience but is limited in its spatial specificity due to a cortical-depth-dependent venous bias. This reduces its localization specificity with respect to neuronal responses, a disadvantage for neuroscientific research. Here, we modified a submillimeter BOLD protocol to selectively reduce venous and tissue signal and increase cerebral blood volume weighting through a pulsed saturation scheme (dubbed Arterial Blood Contrast) at 7 T. Adding Arterial Blood Contrast on top of the existing BOLD contrast modulated the intracortical contrast. Isolating the Arterial Blood Contrast showed a response free of pial-surface bias. The results suggest that Arterial Blood Contrast can modulate the typical fMRI spatial specificity, with important applications in in-vivo neuroscience.

Titel:	Combining arterial blood contrast with BOLD increases fMRI intracortical contrast.
Autor/in / Beteiligte Person:	Priovoulos, N ; de Oliveira IAF ; Poser, BA ; Norris, DG ; van der Zwaag W
Link:	Full Text Finder (Volltext)
Zeitschrift:	Human brain mapping, Jg. 44 (2023-04-15), Heft 6, S. 2509-2522
Veröffentlichung:	New York : Wiley ; <i>Original Publication</i>: New York : Wiley-Liss, c1993-, 2023
Medientyp:	academicJournal
ISSN:	1097-0193 (electronic)
DOI:	10.1002/hbm.26227
Schlagwort:	Humans Brain Mapping methods Magnetic Resonance Imaging methods Antineoplastic Combined Chemotherapy Protocols
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Language: English [Hum Brain Mapp] 2023 Apr 15; Vol. 44 (6), pp. 2509-2522. <i>Date of Electronic Publication: </i>2023 Feb 10. MeSH Terms: Magnetic Resonance Imaging* / methods ; Antineoplastic Combined Chemotherapy Protocols* ; Humans ; Brain Mapping / methods References: Neuroimage. 2016 Mar;128:85-95. (PMID: 26724780) ; Neuroimage. 2018 Aug 1;176:41-55. (PMID: 29665420) ; Magn Reson Med. 1991 Aug;20(2):344-9. (PMID: 1775061) ; Magn Reson Med. 1997 Aug;38(2):224-31. (PMID: 9256101) ; Neuroimage. 2021 Aug 15;237:118195. (PMID: 34038769) ; NMR Biomed. 1994 Mar;7(1-2):75-82. (PMID: 8068529) ; Neuroimage. 2019 Apr 1;189:847-869. (PMID: 30731246) ; Magn Reson Med. 2006 Apr;55(4):816-25. (PMID: 16506156) ; Neuroimage. 2018 Jan 1;164:155-163. (PMID: 28213116) ; Neuroimage. 2010 Jan 15;49(2):1340-9. 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(PMID: 23843129) Grant Information: R01 MH111444 United States MH NIMH NIH HHS Contributed Indexing: Keywords: 3D-EPI; arterial blood contrast; cerebral blood volume; layer-dependent fMRI; magnetization prepared fMRI; ultrahigh field MRI Entry Date(s): Date Created: 20230210 Date Completed: 20230322 Latest Revision: 20230329 Update Code: 20231215 PubMed Central ID: PMC10028680

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Combining arterial blood contrast with BOLD increases fMRI intracortical contrast.