| The first MEG system using a shielded room was operated at the Francis Bitter Magnet Laboratory at MIT for many years. It was under the direction of group leader David Cohen, the inventor of magnetoencephalography. It measured brain activity with a single channel. Dr. Cohen first measured the magnetoencephalogram in 1968. | | In the seventies, Dr. Cohen conceived of the highly succesful concept of planar gradiometers and their orthogonal pairs. Relying on the focal sensitivity of such sensors, he also introduced the arrow map presentation of MEG data. The "Triple Sensor", based on his idea of combining the focal sensitivity of a pair of planar gradiometers with the deep source detection capability of a magnetometer is now used in all modern Elekta Neuromag® MEG systems.
Today, Dr. Cohen holds the position of Associate Professor of Radiology at the Harvard Medical School and Massachusetts General Hospital, site of an advanced Elekta Neuromag 306-channel MEG system. The system brings to fruition many of the concepts that Dr. Cohen pioneered. | |
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