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ctf_channel_sets.m
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ctf_channel_sets.m
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function [ctf] = ctf_channel_sets(ctf);
% ctf_channel_sets - Define CTF MEG sensor regions
%
% ctf = ctf_channel_sets(ctf)
%
% This function parses the resource information in ctf.sensor,
% which is returned from ctf_read_res4
%
% INPUTS
%
% ctf - the struct created by ctf_read_res4
%
% OUTPUTS
%
% ctf.sensor.index - various regional sensor indices
%
% <>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
% < >
% < DISCLAIMER: >
% < >
% < THIS PROGRAM IS INTENDED FOR RESEARCH PURPOSES ONLY. >
% < THIS PROGRAM IS IN NO WAY INTENDED FOR CLINICAL OR >
% < OFFICIAL USE. >
% < >
% <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>
%
% $Revision: 1.4 $ $Date: 2004/12/26 07:50:23 $
% Copyright (C) 2004 Darren L. Weber
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License
% as published by the Free Software Foundation; either version 2
% of the License, or (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
% Modified: 02/2004, Darren.Weber_at_radiology.ucsf.edu
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%ver = '$Revision: 1.4 $';
%fprintf('\nCTF_CHANNEL_SETS [v %s]\n',ver(11:15)); tic;
if ~exist('ctf','var'),
ctf = ctf_folder;
end
if ~isfield(ctf,'setup'),
ctf = ctf_read_res4(ctf.folder);
end
%-------------------------------------------------------------
% Find channel types and define channel sets, see the
% System Administrators .pdf, 'Channel Sets Configuration'
%types = unique([ctf.sensor.info.index])
% 0 1 5 9 11 17
%for typeValue = types,
% index = find([ctf.sensor.info.index] == typeValue);
% labels = ctf.sensor.info(index).label;
%end
% ctf.SensorNames = {...
% 'Ref Magnetometer',... % Sensor Type Index of 0
% 'Ref Gradiometer' ,... % Index of 1
% '' ,... % 2
% '' ,... % 3
% '' ,... % 4
% 'MEG Sensor',... % 5
% '' ,... % 6
% '',... % 7
% '',... % 8
% 'EEG Sensor',... % 9
% 'ADC Input Current',...% 10 ADC Input Current (Amps)
% 'Stimulation input',...% 11
% 'Video Time',... % 12
% '',... % 13
% '',... % 14
% 'SAM Sensor',... % 15
% 'Virtual Channel',... % 16
% 'System Clock',... % 17 System Time Ref
% 'ADC Input Voltage',...% 18 ADC Input Voltage (Volts)
% };
% find the indices of the MEG reference sensors
ctf.sensor.type.meg_ref = [0 1];
ctf.sensor.type.refMagnetometers = 0; % include B*
ctf.sensor.type.refGradiometers = 1; % include G*,P*,Q*,R*
magref = find([ctf.sensor.info.index] == 0);
gradref = find([ctf.sensor.info.index] == 1);
ctf.sensor.index.meg_ref_mag = magref;
ctf.sensor.index.meg_ref_grad = gradref;
ctf.sensor.index.meg_ref = [magref,gradref];
% find the indices of the MEG head sensors
ctf.sensor.type.meg_sens = 5; % include B*
ctf.sensor.index.meg_sens = find([ctf.sensor.info.index] == 5);
% find the indices of the EEG head sensors
ctf.sensor.type.eeg_sens = 9; % include EEG*
ctf.sensor.index.eeg_sens = find([ctf.sensor.info.index] == 9);
% find the indices of the ADC channels
ctf.sensor.type.adc = 10;
ctf.sensor.index.adc = find([ctf.sensor.info.index] == 10);
% find the indices of the STIM channels
ctf.sensor.type.stim_ref = 11;
ctf.sensor.index.stim_ref = find([ctf.sensor.info.index] == 11);
% find the indices of the STIM channels
ctf.sensor.type.video_time = 12;
ctf.sensor.index.video_time = find([ctf.sensor.info.index] == 12);
% find the indices of the SAM channels (Synthetic Aperture Magnetometry)
ctf.sensor.type.sam = 15;
ctf.sensor.index.sam = find([ctf.sensor.info.index] == 15);
% find the indices of the virtual channels
ctf.sensor.type.virtual_channels = 16;
ctf.sensor.index.virtual_channels = find([ctf.sensor.info.index] == 16);
% find the indices of the system clock
ctf.sensor.type.sclk_ref = 17; % include SCLK*
ctf.sensor.index.sclk_ref = find([ctf.sensor.info.index] == 17);
% combine eeg and meg channels
ctf.sensor.index.all_sens = [ ctf.sensor.index.meg_sens, ctf.sensor.index.eeg_sens ];
all = [ ctf.sensor.index.all_sens, ctf.sensor.index.meg_ref, ...
ctf.sensor.index.stim_ref, ctf.sensor.index.sclk_ref ];
ctf.sensor.index.other = setdiff([1:ctf.setup.number_channels],all);
% define regions of MEG sensors
labels = {ctf.sensor.info.label};
ctf.sensor.index.meg_left_central = strmatch('MLC',labels)';
ctf.sensor.index.meg_left_frontal = strmatch('MLF',labels)';
ctf.sensor.index.meg_left_parietal = strmatch('MLP',labels)';
ctf.sensor.index.meg_left_occipital = strmatch('MLO',labels)';
ctf.sensor.index.meg_left_parietal = strmatch('MLP',labels)';
ctf.sensor.index.meg_left_temporal = strmatch('MLT',labels)';
ctf.sensor.index.meg_right_central = strmatch('MRC',labels)';
ctf.sensor.index.meg_right_frontal = strmatch('MRF',labels)';
ctf.sensor.index.meg_right_occipital = strmatch('MRO',labels)';
ctf.sensor.index.meg_right_parietal = strmatch('MRP',labels)';
ctf.sensor.index.meg_right_temporal = strmatch('MRT',labels)';
ctf.sensor.index.meg_mid_central = strmatch('MZC',labels)';
ctf.sensor.index.meg_mid_frontal = strmatch('MZF',labels)';
ctf.sensor.index.meg_mid_occipital = strmatch('MZO',labels)';
ctf.sensor.index.meg_mid_parietal = strmatch('MZP',labels)';
ctf.sensor.index.meg_left = [ ...
ctf.sensor.index.meg_left_central, ...
ctf.sensor.index.meg_left_frontal, ...
ctf.sensor.index.meg_left_occipital, ...
ctf.sensor.index.meg_left_parietal, ...
ctf.sensor.index.meg_left_temporal ];
ctf.sensor.index.meg_right = [ ...
ctf.sensor.index.meg_right_central, ...
ctf.sensor.index.meg_right_frontal, ...
ctf.sensor.index.meg_right_occipital, ...
ctf.sensor.index.meg_right_parietal, ...
ctf.sensor.index.meg_right_temporal ];
ctf.sensor.index.meg_central = [ ...
ctf.sensor.index.meg_left_central, ...
ctf.sensor.index.meg_right_central, ...
ctf.sensor.index.meg_mid_central ];
ctf.sensor.index.meg_frontal = [ ...
ctf.sensor.index.meg_left_frontal, ...
ctf.sensor.index.meg_right_frontal, ...
ctf.sensor.index.meg_mid_frontal ];
ctf.sensor.index.meg_occipital = [ ...
ctf.sensor.index.meg_left_occipital, ...
ctf.sensor.index.meg_right_occipital, ...
ctf.sensor.index.meg_mid_occipital ];
ctf.sensor.index.meg_parietal = [ ...
ctf.sensor.index.meg_left_parietal, ...
ctf.sensor.index.meg_right_parietal, ...
ctf.sensor.index.meg_mid_parietal ];
ctf.sensor.index.meg_temporal = [ ...
ctf.sensor.index.meg_left_temporal, ...
ctf.sensor.index.meg_right_temporal ];
%t = toc; fprintf('...done (%6.2f sec)\n\n',t);
return