Magnetics Business & Technology - May/June 2019 - 15

RESEARCH & DEVELOPMENT

First Real-Time Monitoring of Biomagnetic Field of Human Heart Reported by Medical R&D
Team in Tokyo
magnetocardiography signals from both anterior and lateral chest
walls of sitting subjects. The array was composed of 95 magnetoresistive-device-based magnetic sensors from TDK.
Next, the group plans to conduct verification tests and continue
development efforts for practical application of the device. They
also credited the Kanazawa Institute of Technology for providing
technical support.
For more info, see www.global.tdk.com and www.tmd.ac.jp.

Using high-sensitivity magnetoresistive sensors
from TDK Corporation, a collaborative effort at a
leading medical science center has succeeded in
what the parties report is the world's first real-time
measurement of magnetic field distribution, known
as the biomagnetic field, in the human heart.

Total Magnetic Solutions

The breakthrough was jointly announced in March
by Shigenao Ishiguro, president of TDK, and two
researchers at Tokyo Medical & Dental University
(TMDU): Professor Shigenori Kawabata with the
Joint Research Department of Advanced Medical
Technology; and Professor Kenzo Hirao, a specialist in cardiac electrophysiology at the Graduate
School of Medical and Dental Sciences.
In 2016, the collaboration produced the world's first
visualization of cardiac magnetic field distribution,
using a magnetorestrictive sensor array at room
temperature. Since then TDK and TMDU have
been working on the development of more accurate
magnetic sensors as well as a measuring device
to replace the existing superconducting quantum
interference device (SQUID) sensors.
Now, through TDK's advanced magnetic sensor
technology, they have developed magnetic sensors
featuring even greater sensitivity, resulting in the
world's first successful real-time measurement of
the cardiac magnetic field distribution. The biomagnetic field is composed of magnetic fields generated
by the electrical activity of living organisms. It is
observed in organs such as the heart, brain, nerves
and muscles.
Because the technology also facilitates measurement through the parallel connection of multiple
room-temperature sensors and allows for higherdensity measurement, the team has been able to
develop a measuring device that enables measurement on two planes, considered optimal for measuring cardiac activity.

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May/June 2019 * Magnetics Business & Technology

15
http://www.tmd.ac.jp. http://www.global.tdk.com http://www.magnetapplications.com http://www.MagneticsMag.com
Magnetics Business & Technology - May/June 2019

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