Re: [Eidors Help] Adaptation of conductivities

[Sabine S. <sas...@ma...>]

Hi Bartek,

Thank you for your response.

I’m very interesting in your code. It would be glad if I get an idea how to continue working. 

Kind regards,

Sabine

________________________________________
Von: Bartek Grychtol [b.g...@gm...]
Gesendet: Donnerstag, 15. Mai 2014 21:41
An: Questions and discussion on EIDORS
Betreff: Re: [Eidors Help] Adaptation of conductivities

Hi Sabine,

The SAH262 is composed of 4 layers, if I recall correctly. You would need to mesh each layer separately starting from the outside (assuming that's where you put electrodes) modifying the interface surfaces as you do in order to propagate the electrode refinement.

As it happens, I've done this for this specific mesh some time ago. If you would be willing to test (and possibly clean up) my code for your application, I can send it to you and if (once) it all works nicely, we'd create a tutorial and a data-contribution page in EIDORS.

Best,

Bartek


On Thu, May 15, 2014 at 7:06 PM, Sabine Stegmaier <sas...@ma...<mailto:sas...@ma...>> wrote:
Hi everybody,

there aren’t any solutions in the mailing list. That’s the reason why I’m writing.

I would like to recognize volume shifts inside the head using EIT. For this issue, I’m using the head model of Mr Tizzard as forward model. With the function "place_elec_on_surface", the electrodes are positioned. The problem is the plain remeshing of the model with this function. The information about the assignment of conductivity get lost because the model has 283.382 nodes in contrast to the original model SAH262 with 262.368 nodes. I do not have any idea how an assignment of conductivities is still possible. The difference cannot be composed solely of electrodes (5043 nodes). Are there another option to adjust the conductivities before using "place_elec_on_surface" and without mk_image?

In the attachment, I send the fwd_model as *.MAT-file. Please tell me, if you need more informations.

Thank you for your efforts!

Kind regards,
Sabine


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