Journal
MEDICAL PHYSICS
Volume 28, Issue 4, Pages 521-527Publisher
AMER INST PHYSICS
DOI: 10.1118/1.1354627
Keywords
brain imaging; fMRI; near infrared
Funding
- NCI NIH HHS [CA57032] Funding Source: Medline
- NCRR NIH HHS [RR10966] Funding Source: Medline
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The aim of this study was to compare functional cerebral hemodynamic signals obtained simultaneously by near infrared spectroscopy (NIRS) and by functional magnetic resonance imaging (fMRI). The contribution of superficial layers (skin and skull) to the NIRS signal was also assessed. Both methods were used to generate functional maps of the motor cortex area during a periodic sequence of stimulation by finger motion and rest. In all subjects we found a good collocation of the brain activity centers revealed by both methods. We also found a high temporal correlation between the BOLD signal (fMRI) and the deoxy-hemoglobin concentration (NIRS) in the subjects who exhibited low fluctuations in superficial head tissues. (C) 2001 American Association of Physicists in Medicine.
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