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Method for positioning sensors for a conformal MEG array

IP.com Disclosure Number: IPCOM000249229D
Publication Date: 2017-Feb-10
Document File: 1 page(s) / 680K

Publishing Venue

The IP.com Prior Art Database

Related People

Orang Alem: CONTACT

Abstract

We describe a method to enable an array of OPM sensors to be positioned conformally around a human head for magnetoencephalography (MEG) applications. This mechanism applies a force on each sensor along its axes of motion to move the sensors independently, or in sets or subsets, towards the intended surface. The mechanism can use a variety of methods such as springs, elastic material, pneumatic, hydraulic, or mechanical actuators, and operate manually or be controlled by an automated or semi-automated algorithm.

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QuSpin Inc. Feb. 10, 2017

Method for positioning sensors for a conformal MEG array

Orang Alem, Svenja Knappe, Jeramy Hughes, James Osborne, and Vishal Shah

Compact and fully integrated Optically Pumped Magnetometers (OPMs) have been demonstrated for

magnetoencephalography (MEG) applications with performance rivaling and even surpassing current SQUID

sensors. One key advantage provided by an array of independent OPM sensors is the possibility of positioning the

sensors as desired and as closely to the source as possible. This characteristic enables a helmet with an array of OPM

sensors to optimally cover the surface of the head of varying shapes and sizes.

We describe an MEG helmet for use with OPM sensors that incorporates mechanisms that automatically adapt the

sensor array to the size and shape of the subject’s head. This mechanism applies a force on each sensor along its

axes of motion to move the sensors independently, or in sets or subsets, towards the intended surface. One mode

of operation could have the mechanism extend the sensors all the way inside along their range of motion. As the

helmet is placed on the subject’s head, the surface of the head would contact and push each sensor outward until

the helmet is fully placed on the head and the array conforms to the shape of the head. Another option would

employ an active mechanism for sensor movement that would have the sensors retracted outward while the helmet

is positioned over the head and then allow the mechanism to move the sensors towards the head until every sensor

has contact with the head. Or the sensors can be moved into position by the mechanism to a desired setpoint. In

any case, the mechanism ensures that every sensor will move into a conformal or intended position relative to the

head. The mechanism could apply this force continuously to maintain contact with the head even during movement

or it c...