A tissue-like optically turbid and electrically conducting phantom for simultaneous EEG and near-infrared imaging.
We describe a phantom for simultaneous electroencephalography (EEG) and near-infrared imaging which consists of a solid, optically turbid and electrically conducting interface enclosing a tissue-mimicking aqueous scattering solution. The interface provides an electrical contact impedance comparable to that of the human scalp while the phantom as a whole has optical properties and electrical conductivity equivalent to that of head tissue. The construction is described and our design is evaluated experimentally using an optically absorbing target which also provides an EEG-equivalent electric field source. The results of this simultaneous EEG and near-infrared imaging experiment are presented.
Cooper
R J
RJ
Department of Medical Physics & Bioengineering, University College London, Gower Street, London WC1E 6BT, UK.
Bhatt
D
D
Everdell
N L
NL
Hebden
Jeremy C
JC
D040761:Biomimetic Materials; D001931:Brain Mapping / Q000295:instrumentation*; D017076:Computer-Aided Design; D004553:Electric Conductivity; D004569:Electroencephalography / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007259:Infrared Rays; D009391:Nephelometry and Turbidimetry / Q000295:instrumentation*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation*