| Literature DB >> 20408238 |
E M Haacke1, S Lai, J R Reichenbach, K Kuppusamy, F G Hoogenraad, H Takeichi, W Lin.
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). Copyright (c) 1997 Wiley-Liss, Inc.Entities:
Year: 1997 PMID: 20408238 DOI: 10.1002/(SICI)1097-0193(1997)5:5<341::AID-HBM2>3.0.CO;2-3
Source DB: PubMed Journal: Hum Brain Mapp ISSN: 1065-9471 Impact factor: 5.038