[Neuro] fmri

Jonathan Toomim jtoomim at jtoomim.org
Sun Jul 1 21:55:23 PDT 2012


I'm the one doing the fNIRS stuff. I sometimes look at this list.

The fNIRS stuff I'm doing is more of a business than a project. 
Closed-source hardware, etc. Not really looking for help with it, unless 
you want to work on the software (which is open source).

Atmel makes mediocre analog-to-digital converters. For EEG/brainwave 
stuff, having a good analog-to-digital converter is pretty important. I 
suggest you not use the Arduino's ADC for EEG. A good sigma-delta ADC 
(or perhaps an SAR) will make things work much better. For my fNIRS 
project, I use these guys:
http://www.analog.com/en/processors-dsp/analog-microcontrollers/aduc7061/products/product.html
It's a 32-bit ARM7 microcontroller with dual 24-bit sigma-delta ADCs. 
I've got about two dozen extras of their $25 dev kits. Not as easy to 
use as an Arduino, though.

Jonathan

On 6/29/2012 2:04 PM, Kelly wrote:
> Hi Sabina,
>
> fMRI requires an MRI machine and they are insanely huge and expensive.
> I'm not aware of any hackerspaces that have them. Usually they reside
> on medical and academic campuses.
>
> We have done some EEG projects at noisebridge, but not fMRI. EEG by
> comparison is cheap and easy to build. To my knowledge, the closest
> we've gotten to fMRI is that we're talking about doing some 3D
> modeling based on static, structural MRI, and then one member of the
> community is working on near-infrared spectroscopy
> (http://en.wikipedia.org/wiki/Near-infrared_spectroscopy) which is
> like a cheaper, more portable (but substantially different) substitute
> for fMRI. That would be Jonathan, whom I think is on this list but I
> forget. We should probably pressure him into building a wiki page.
>
> You can of course learn more about these things on wikipedia, but our
> wiki also details some of the projects we've worked on at our
> hackerspace: https://www.noisebridge.net/wiki/Category:Neuro
>
> -Kelly
>
> On Fri, Jun 29, 2012 at 10:04 AM, Sab Plame<sab.plame at gmail.com>  wrote:
>> Hello there,
>>
>> I'm working on a project involving brainwaves and Arduino and would like to
>> work more on similar projects.
>>
>> A friend of mine who is member of Hackspace London, was around a couple of
>> weeks ago.
>> He said he met / spoke to a guy who was working on FMRI- related projects,
>> and was wondering if and what kind of work you guys are doing in that field.
>>
>> Hope to hear from you and thanks :)
>>
>> sabina
>>
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>> Neuro at lists.noisebridge.net
>> https://www.noisebridge.net/mailman/listinfo/neuro
>>
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