Abstract

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Author(s):: HE Xiang1; HUANG Yuxiang2; LI Shuguang3; SU Shengran1; ZHENG Wenqiang1; HU Zhenghui1; LIN Qiang1; 1. Collaborative Innovation Center for Bio-Med Physics Information Technology/Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou 310023, China; 2. Hangzhou Chinmagnetics Technology Co., LTD, Hangzhou 310052, China; 3. Department of Measurement Technology and Instruments, Zhejiang University of Science and Technology, Hangzhou 310023, China

Keywords:: ; Keywords: atomic magnetometer; measurement of cardiac magnetic field; pulse pump; room temperature

Abstract:: Abstract: Electrocardiogram is an important modality for diagnosis of heart disease, but it may fail to timely and accurately diagnose coronary heart disease and other cardiac conditions. As a non-contact and non-invasive technique, magnetocardiography provides an alternative for predicting and diagnosing heart diseases and allows rapid detection of ischemic cardiovascular disease. So far the measurement of heart magnetic field depends mainly on superconducting quantum interference device (SQUID), which needs to work in liquid helium condition (-269 °C) with high manufacturing and maintenance costs. Herein, we report a pulse pump Rb atomic magnetometer based on optical rotation effect with a sensitivity of 1 pT/Hz1/2. This magnetometer can quickly respond to changes in external magnetic fields. Using this magnetometer, we successfully measured the magnetic signals from the human heart at room temperature, which represents the first successful attempt of measuring cardiac magnetic field using atomic magnetometer in China. This success will promote the advance of research and clinical application of magnetic field measurement.