Simplified spinal cord phantom for evaluation of SQUID magnetospinography

11th European Conference on Applied Superconductivity

Adachi, Y.^1 ; Oyama, D.^1 ; Somchai, N.^2 ; Kawabata, S.^3 ; Uehara, G.^1

Applied Electronics Laboratory, Kanazawa Institute of Technology, Ishikawa, Japan^1

Osaka University Graduate School, Osaka, Japan^2

Tokyo Medical and Dental University, Tokyo, Japan^3

关键词: Catheter electrodes;    Current distribution;    Cylindrical vessels;    Distribution patterns;    Functional imaging;    Magnetic field distribution;    Non-invasive diagnostics;    Source analysis method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/4/042001/pdf
DOI  :  10.1088/1742-6596/507/4/042001

来源: IOP

【 摘 要 】

Spinal cord functional imaging by magnetospinography (MSG) is a noninvasive diagnostic method for spinal cord diseases. However, the accuracy and spatial resolution of lesion localization by MSG have barely been evaluated in detail so far. We developed a simplified spinal cord phantom for MSG evaluation. The spinal cord phantom is composed of a cylindrical vessel filled with saline water, which acts as a model of a neck. A set of modeled vertebrae is arranged in the cylindrical vessel, which has a neural current model made from catheter electrodes. The neural current model emulates the current distribution around the activated site along the axon of the spinal cord nerve. Our MSG system was used to observe the magnetic field from the phantom; a quadrupole-like pattern of the magnetic field distribution, which is a typical distribution pattern for spinal cord magnetic fields, was successfully reproduced by the phantom. Hence, the developed spinal cord phantom can be used to evaluate MSG source analysis methods.