@article{oai:soar-ir.repo.nii.ac.jp:00012415, author = {Tashiro, Kunihisa and Wakiwaka, Hiroyuki and Inoue, Shin-ichiro}, issue = {2}, journal = {Journal of the Japan Society of Applied Electromagnetics and Mechanics}, month = {Jun}, note = {The purpose of our study is to demonstrate magnetocardiography (MCG) measurements from a human heart using our developed induction gradiometer. We have already reported the capabilities of our gradiometer, whose sensitivity at low frequency is comparable to that of a commercial SQUID sensor. However, we could not observe magnetic fields less than 1 nT because of electrical interference at the gradiometer. We solved this problem using a grounding technique and re-designed electronics. We modeled an MCG signal generated by PC-based instrumentation using LabVIEW software, and a magnetic field was generated with a one-turn coil. In order to generate an MCG field with an R-wave peak amplitude 100 pTp-p, we estimated the required current value for the one-turn coil. The experimental results obtained in our laboratory environment, we confirmed the observation of the R-wave with the induction gradiometer., Article, Journal of the Japan Society of Applied Electromagnetics and Mechanics. 20(2):453-458 (2012)}, pages = {453--458}, title = {Preliminary study of MCG measurement with induction gradiometer}, volume = {20}, year = {2012} }