Hi Vladimir,
Thanks very much for the prompt reply. Unfortunately the script doesn't seem to correct the MEG channels being set to Other, however it does allow for the template to be loaded. Additionally, fiducials appear to be read in when using MEGTools and a 3d sensor map can be seen. Another problem occurs when I try to do the source reconstruction. When I try to coregister the data to a template, I get the following error message
??? Reference to non-existent field 'modality'.
Error in ==> spm_eeg_inv_checkdatareg at 23
str = sprintf('%s|', datareg(:).modality);
Error in ==> spm_eeg_inv_datareg_ui at 186
spm_eeg_inv_checkdatareg(D);
Error in ==> spm_eeg_inv_imag_api>DataReg_Callback at 80
handles.D = spm_eeg_inv_datareg_ui(handles.D);
Error in ==> spm_eeg_inv_imag_api at 53
feval(varargin{:}); % FEVAL switchyard
??? Error while evaluating uicontrol Callback
Does this have anything to do with the incorrect channel type identification?
Thanks,
Peter
________________________________________
From: Vladimir Litvak [[log in to unmask]]
Sent: Monday, 1 October 2012 9:12 PM
To: Peter Goodin
Cc: [log in to unmask]
Subject: Re: [SPM] Neuromag triux sensors not loading
Dear Peter,
Please see https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=SPM;95cd0b22.1203
. Let me know if it doesn't help.
Vladimir
On Mon, Oct 1, 2012 at 12:01 PM, Peter Goodin <[log in to unmask]> wrote:
> Hi SPM list,
>
> I'm having a bit of trouble getting SPM8 to read in the sensor locations
> from our neuromag Triux system. I'm using fieldtrip to preprocess my data
> and I've tried the following methods outlined below. Any thoughts on what
> the problem is would be greatly appreciated.
>
> 1. Converting fieldtrip data (both segmented, preprocessed file and an
> averaged file) to SPM8 using the spm_eeg_spm2ft function. This imports all
> the channel labels, but the type is "Other". I've tried using MEEGtools >
> Copy MEG sensors then using the converted data as the SPM8 EEG file and the
> raw .fif file as the raw MEG file, when I get the following:
>
> 306 MEG channel locations transformed
> Error using ==> mne2grad at 121
> Number of MEG channels identified does not match number of channels in grad
> structure!!!!!
> Opening raw data file D:\Ph.D_Data\MEG\Raw\c103\c103_nback_meg_tsss.fif...
> Range : 33500 ... 788499 = 67.000 ... 1576.998 secs
> Ready.
> ??? Reference to non-existent field 'grad'.
>
> Error in ==> spm_eeg_copygrad at 16
> D = sensors(D, 'MEG', ft_convert_units(hdr.grad, 'mm'));
>
> Error in ==> spm_MEEGtools at 46
> eval(fun);
> Error in ==> spm at 965
> evalin('base',xTB(i).prog);
>
> ??? Error while evaluating uicontrol Callback
>
> 2. Converting the fieldtrip data using the above method, but using "prepare
> spm file" and loading the neuromag_306_EEG70.mat file located in the
> /spm8/EEGtemplates folder which appears to work and brings up a layout that
> looks it should. After applying and going back the channel information,
> position changes to yes, but type is still "Other". Additionally when I view
> the time series, there's no option for a topoplot (however I'm not sure if
> this is due to channel type as other or another issue).
>
> 3. Starting from scratch and converting a maxfiltered .fif file. I get valid
> information for channel label, type and unit, but nothing relating to
> position. I then use the same "prepare spm file" method and use the same
> template as discussed in 2. After updating the channel list, all the sensor
> positions are shown and it allows for a topoplot. The problem happens when
> trying to save the channel locations and the following error occurs:
>
> ??? Reference to non-existent field 'label'.
>
> Error in ==> spm_eeg_prep_ui>SaveTemplateCB at 550
> Cnames = handles.label;
>
> Error in ==> spm_eeg_prep_ui at 16
> eval(callback);
>
> ??? Error while evaluating uimenu Callback
>
> Again, any help would be greatly appreciated.
>
> Peter.
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