In vivo measurement of blood oxygen saturation using magnetic resonance imaging: a direct validation of the blood oxygen level-dependent concept in functional brain imaging. Haacke, E M, Lai, S, Reichenbach, J R, Kuppusamy, K, Hoogenraad, F G, Takeichi, H, & Lin, W Human Brain Mapping, 5(5):341--346, 1997.
In vivo measurement of blood oxygen saturation using magnetic resonance imaging: a direct validation of the blood oxygen level-dependent concept in functional brain imaging [link]Paper  doi  abstract   bibtex   
A novel noninvasive magnetic resonance imaging (MRI) method was developed to determine in vivo blood oxygen saturation and its changes during motor cortex activation in small cerebral veins. Specifically, based on susceptibility measurements in the resting states, pial veins were found to have a mean oxygen saturation of Yrest=0.544+/-0.029 averaged over 14 vessels in 5 volunteers. During activation, susceptibility measurements revealed an oxygen saturation change of DeltaYsusc=0.14+/-0.02. Independent evaluation from blood flow velocity measurements yielded a value of DeltaYflow=0.14+/-0.04 for this change. These results validate the blood oxygenation level-dependent (BOLD) model in functional MRI (fMRI).
@article{haacke_vivo_1997,
	title = {In vivo measurement of blood oxygen saturation using magnetic resonance imaging: a direct validation of the blood oxygen level-dependent concept in functional brain imaging},
	volume = {5},
	issn = {1065-9471},
	shorttitle = {In vivo measurement of blood oxygen saturation using magnetic resonance imaging},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/20408238},
	doi = {10.1002/(SICI)1097-0193(1997)5:5<341::AID-HBM2>3.0.CO;2-3},
	abstract = {A novel noninvasive magnetic resonance imaging (MRI) method was developed to determine in vivo blood oxygen saturation and its changes during motor cortex activation in small cerebral veins. Specifically, based on susceptibility measurements in the resting states, pial veins were found to have a mean oxygen saturation of Yrest=0.544+/-0.029 averaged over 14 vessels in 5 volunteers. During activation, susceptibility measurements revealed an oxygen saturation change of DeltaYsusc=0.14+/-0.02. Independent evaluation from blood flow velocity measurements yielded a value of DeltaYflow=0.14+/-0.04 for this change. These results validate the blood oxygenation level-dependent (BOLD) model in functional MRI (fMRI).},
	number = {5},
	urldate = {2010-09-30},
	journal = {Human Brain Mapping},
	author = {Haacke, E M and Lai, S and Reichenbach, J R and Kuppusamy, K and Hoogenraad, F G and Takeichi, H and Lin, W},
	year = {1997},
	pmid = {20408238},
	pages = {341--346},
	file = {haacke1997.pdf:/Users/nickb/Zotero/storage/AM5VNAR8/haacke1997.pdf:application/pdf;In vivo measurement of blood oxygen saturation usi... [Hum Brain Mapp. 1997] - PubMed result:/Users/nickb/Zotero/storage/SJE75NBS/20408238.html:text/html}
}

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