Dear Vladimir,I have the spherical coordinates in BESA-format, converted to a .spf file, the content looks like this:
Fp1 -0.30883 0.95048 -0.034899
AF3 -0.40625 0.8712 0.27564
F7 -0.80852 0.58743 -0.034899
F3 -0.54501 0.67303 0.5
FC1 -0.37471 0.37471 0.84805
FC5 -0.88789 0.34083 0.30902
T7 -0.99939 0 -0.034899
C3 -0.71934 0 0.69466
CP1 -0.37471 -0.37471 0.84805
CP5 -0.88789 -0.34083 0.30902
P7 -0.80852 -0.58743 -0.034899
P3 -0.54501 -0.67303 0.5
Pz 0 -0.71934 0.69466
PO3 -0.40625 -0.8712 0.27564
O1 -0.30883 -0.95048 -0.034899
Oz 0 -0.99939 -0.034899
O2 0.30883 -0.95048 -0.034899
PO4 0.40625 -0.8712 0.27564
P4 0.54501 -0.67303 0.5
P8 0.80852 -0.58743 -0.034899
CP6 0.88789 -0.34083 0.30902
CP2 0.37471 -0.37471 0.84805
C4 0.71934 0 0.69466
T8 0.99939 0 -0.034899
FC6 0.88789 0.34083 0.30902
FC2 0.37471 0.37471 0.84805
F4 0.54501 0.67303 0.5
F8 0.80852 0.58743 -0.034899
AF4 0.40625 0.8712 0.27564
Fp2 0.30883 0.95048 -0.034899
Fz 0 0.71934 0.69466
Cz 0 0 1
Could you please tell me how I can project these locations to 2D for my layout? Is it possible to do this via GUI?Thank you very much!
Best regards,
FabianOn Mon, Jun 30, 2014 at 12:30 PM, Vladimir Litvak <[log in to unmask]> wrote:
Dear Fabian,The most straightforward was to create a 2D layout for your Biosemi cap would be to load a 3D sensor locations file (in .sfp format) and then project the locations to 2D to make a layout. You could either look for a standard file from the manufacturer or make a measurement with a 3D digitiser.SPM currently includes standard locations for 64- and 128-channels Biosemi caps. If there is interest from Biosemi users to also add 256- and 32- channel caps and they provide us with good quality 3D locations I'd be happy to add them but, just to SPM12 as SPM8 is no longer being developed. It shouldn't be a problem to load them manually in SPM8 though.Best,VladimirOn Sun, Jun 29, 2014 at 12:02 PM, Fabian Klein <[log in to unmask]> wrote:
Best regards,Thank you very much for your help!Since the 32, 64, 128 and 256 channel headcaps from BioSemi all have standardized layouts, it would maybe make sense to include them into the "standard" SPM distribution.I would need a script that uses the layout from the fieldtrip .lay-file, channels 1:32 + VEOG (channel 33-34) + HEOG (channel 35-36).Could you maybe help me with this issue? That would be great!Since I am rather a user than a developer, I have difficulties in finding a way to implement this layout file in SPM.Dear Vladimir,For our most recent data sets, we need a montage for the 32channel headcap. The only layout file I found for this headcap is from FieldTrip - https://code.google.com/p/fieldtrip/source/browse/trunk/template/layout/biosemi32.lay?r=4536 .
I am a PHD student at the Bielefeld University and we are trying to analyze our EEG data acquired by a BioSemi system with SPM8.
Fabian
--
Fabian Klein, M.Sc.
--------------------------------------------------------------------
Universität Bielefeld
Fakultät für Psychologie
AE Klinische Psychologie und Psychotherapie
Raum: T3-262
Tel.: (0521) 106-4489
[log in to unmask]
--
Fabian Klein, M.Sc.
--------------------------------------------------------------------
Universität Bielefeld
Fakultät für Psychologie
AE Klinische Psychologie und Psychotherapie
Raum: T3-262
Tel.: (0521) 106-4489
[log in to unmask]