Measuring Force During Magnetic Resonance Imaging (MRI)

When we move, muscles contract and produce force. Neuroimagingsolutions, LLC has developed a system to measure force within magnetic resonance imaging and magnetoencephalography environments.  Most force sensors available on the market are made with metal, and are not compatible with these environments.  A particularly useful procedure is to measure force during functional magnetic resonance imaging (fMRI) or other types of neuroimaging studies, so that one can quantify and measure functional brain activity of humans.  This technology is useful for studying humans with neurodegenerative diseases, assessing drug-related changes acutely, and for tracking the progression of brain function over time.


Fully made 50 N sensor used in hand grip force control

Neuroimagingsolutions, LLC, provides the ability to precisely measure force with a variety of sensors that can be used for upper limb and lower limb studies in humans, and of the forelimb in rodents.  The sensors are compatible with Micron Optics fiber optic interrogators.  For human studies, we provide biofeedback of the force through available software that allows force control studies compatible with magnetic resonance imaging (MRI) systems at 3 Tesla, high-field magnetic resonance imaging (MRI) systems up to 11 Tesla, and during magnetoencephalography (MEG).  The sensors use fiber Bragg grating technology and are customized to measure forces in the range of 0-1 N, 0-50 N, 0-150 N, and 0-700 N depending on the specific application and need.  The sensors are packaged within a composite material that is rigid and non-metal, so that it does not interfere with the MRI or MEG signals.  The image above shows a force sensor used in hand grip studies, and the image below shows functional magnetic resonance imaging data from 20 healthy individuals while performing a hand force task with the right hand at 3 Tesla.  As can be seen, networks across the brain cortex and subcortex are activated in these studies.


Functional magnetic resonance imaging activation averaged across 20 subjects during a hand grip force task using the sensor 

If interested in these products, please visit for additional information.

2017-03-23T22:52:54+00:00 November 17th, 2015|Blog Posts|

Leave A Comment