Gradiometer Module for Fetal Magnetocardiography Detection in a Thin Magnetically Shielded Room

摘要

is employed for our gradiometers. Superconducting connectivity technique is utilized to connect input coil and pickup coil. Firstorder gradiometers with different baselines are thus developed. After the evaluation of the magnetic field and gradient field inside the tMSR, measurement of fMCG signals are taken with the gradiometers mentioned above. Through the analysis of the SNR of fMCG signals measured with each gradiometer in a tMSR and the comparison among them, the desirable configuration of the axial gradiometers is obtained.