Title :
Direct detection of the magnetic fields of neuronal impulses using MRI
Author :
Chow, L.S. ; Yang, H. ; Whitby, E. ; Cook, G.G. ; Paley, M.N.
Author_Institution :
Dept. of Acad. Radiol., Univ. of Sheffield, Sheffield
Abstract :
The neuronal (ionic) current caused by nerve firing induces subtle and transient magnetic flux density changes that potentially modulate the MR signal over successive gradient echo planar image frames. Frequency spectra derived from Fourier transformation of experimental data down these time frames show evidence of a strobe stimulus localized to regions containing the optic nerve and visual cortex, which suggests that direct detection of the magnetic fields emanating from these regions has been achieved.
Keywords :
biomedical MRI; magnetic field measurement; Fourier transformation; MRI; frequency spectra; gradient echo planar image frame; magnetic field; magnetic resonance imaging; magnetic resonance signal; nerve firing; neuronal current; neuronal impulse; optic nerve; strobe stimulus; transient magnetic flux density; visual cortex; Imaging phantoms; Magnetic field measurement; Magnetic fields; Magnetic modulators; Magnetic resonance imaging; Optical modulation; Optical sensors; Phase detection; Phase modulation; Tellurium;
Conference_Titel :
Antennas and Propagation Conference, 2008. LAPC 2008. Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4244-1893-0
Electronic_ISBN :
978-1-4244-1894-7
DOI :
10.1109/LAPC.2008.4516858
