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

E M Haacke; S Lai; J R Reichenbach; K Kuppusamy; F G Hoogenraad; H Takeichi; W Lin

doi:10.1002/(SICI)1097-0193(1997)5:5<341::AID-HBM2>3.0.CO;2-3

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

Hum Brain Mapp. 1997;5(5):341-6. doi: 10.1002/(SICI)1097-0193(1997)5:5<341::AID-HBM2>3.0.CO;2-3.

Authors

E M Haacke¹, S Lai, J R Reichenbach, K Kuppusamy, F G Hoogenraad, H Takeichi, W Lin

Affiliation

¹ Mallinckrodt Institute of Radiology, Washington University, St. Louis, Missouri 63110, USA. haacke@mirlink.wustl.edu

PMID: 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).