System for positioning and maintaining the position of a reference sensor around a magnetoencephalography helmet

Inventors: Etienne Labyt (Grenoble Cedex, FR); William Fourcault (Grenoble Cedex, FR); Ilea Paquin-Honore (Lille, FR); Guilhem Laffont (Lille, FR)

Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

A61B5/245 A61B5/6803 A61B90/08 A61B2560/0406 A61B2560/0462

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Quick Facts

Patent No.: US 12685471
App. No.: 18/547,735
Granted: Jul 21, 2026
Kind: B2

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Abstract

A system for positioning and maintaining a position of a reference sensor around a magnetoencephalography helmet. The system includes an arch comprising at least one fixing branch for fixing the arch to an MEG helmet, a support plate on which the branch is fixed, a sensor support post fixed to the support plate of the arch; and a locking component for fixing the reference sensor to the post in at least one position defining the position with respect to an MEG helmet.

Claims (15)

1 . A system for positioning and maintaining a position of a reference sensor on a magnetoencephalography (MEG) helmet, the system comprising:

an arch including at least one fixing branch to fix the arch to the MEG helmet, and a support plate to which each fixing branch of the at least one fixing branch is fixed,

a sensor support post, different from the at least one fixing branch, fixed to the support plate of the arch, the sensor support post being fixed at a top of the MEG helmet and extending through the arch; and

a locking piece to fix the reference sensor to the sensor support post in at least one position defining the position with respect to the MEG helmet.

2 . The system as claimed in claim 1 , wherein the arch comprises two fixing branches arranged symmetrically with respect to one another with respect to the support plate.

3 . The system as claimed in claim 1 , wherein the sensor support post is a hollow post extending on a longitudinal axis in which the reference sensor can be inserted according to several longitudinal positions.

4 . The system as claimed in claim 3 , wherein the hollow post comprises a plurality of wedging slits, spaced apart longitudinally, each forming a support for a positioning wedge for positioning the reference sensor according to a longitudinal position.

5 . The system as claimed in claim 3 , wherein the locking piece is a locking ring to be tightened around the hollow post.

6 . The system as claimed in claim 1 , wherein the arch comprises shutes to position cables of OPM sensors fixed to the MEG helmet.

7 . The system as claimed in claim 1 , wherein each fixing branch, of the at least one fixing branch, comprises, at a free end thereof, a plate to be screwed onto the MEG helmet by a tightening thumbwheel.

8 . The system as claimed in claim 1 , wherein the arch, the sensor support post, and the locking piece are made of plastic material.

9 . An assembly, comprising:

the MEG helmet; and

the system for positioning and maintaining the position as claimed in claim 1 , the system being fixed to the MEG helmet.

10 . The assembly as claimed in claim 9 , wherein the MEG helmet further comprises at least one anchor point to which the at least one fixing branch is fixed by a tightening thumbwheel, the anchor point being an inclined flat provided with a drilled and tapped hole into which the tightening thumbwheel is screwed.