Set parameters for leadfield calculation basis_parm = vb_set_basis_parm 2006/09/20 ver 0.5 by M. Sato Copyright (C) 2011, ATR All Rights Reserved. License : New BSD License(see VBMEG_LICENSE.txt)
0001 function basis_parm = vb_set_basis_parm_eeg_test(mode) 0002 % Set parameters for leadfield calculation 0003 % basis_parm = vb_set_basis_parm 0004 % 0005 % 2006/09/20 ver 0.5 by M. Sato 0006 % 0007 % 0008 % Copyright (C) 2011, ATR All Rights Reserved. 0009 % License : New BSD License(see VBMEG_LICENSE.txt) 0010 0011 % 0012 % --- Standard parameters (relative path from proj_root) 0013 % 0014 brain_id = 'SK'; 0015 data_id = 'SK_low_epoch'; 0016 0017 basis_parm.brain_file = [brain_id 'brain' '.brain.mat' ]; 0018 basis_parm.area_file = [brain_id 'brain' '.area.mat' ]; 0019 0020 basis_parm.meg_file = ['eeg/' data_id '.info.mat']; 0021 0022 % Head files for EEG 3-shell model 0023 basis_parm.head_file = ... 0024 {'SK_csf_2000.head.mat'; 0025 'SK_skull_2000.head.mat'; 0026 'SK_scalp_2000.head.mat'}; 0027 0028 % 0029 % --- Output file(relative path from proj_root) 0030 % 0031 if exist('mode','var') && mode==0 0032 basis_parm.basis_file = [brain_id '_' data_id '_sph' '.basis.mat']; 0033 else 0034 basis_parm.basis_file = [brain_id '_' data_id '.basis.mat']; 0035 end 0036 0037 global vbmeg_inst; 0038 const = vbmeg_inst.const; 0039 0040 % MEG/EEG device name 0041 basis_parm.device = 'BIOSEMI'; 0042 0043 % BEM mode definition 0044 % const.BASIS_MEG_SPHERE = 0; % MEG Sphere model (Sarvas) 0045 % const.BASIS_MEG_BEM = 1; % MEG 1-shell BEM 0046 % const.BASIS_MEG_HARMONICS = 2; % MEG Spherical harmonics expansion 0047 % const.BASIS_EEG_SPHERE = 3; % EEG 3-shell Sphere model 0048 % const.BASIS_EEG_BEM = 4; % EEG 3-shell BEM 0049 0050 if exist('mode','var') && mode==0 0051 basis_parm.bem_mode = const.BASIS_EEG_SPHERE; 0052 else 0053 basis_parm.bem_mode = const.BASIS_EEG_BEM; 0054 end 0055 0056 % Current degree of freedom (Basis_mode) 0057 % const.CURRENT_NORMAL = 1; % normal to cortex 0058 % const.CURRENT_TANGENT = 2; % tangent vectors 0059 % const.CURRENT_3D = 3; % x, y, z -direction 0060 0061 basis_parm.Basis_mode = const.CURRENT_NORMAL; 0062 0063 % Average mode for normal direction 0064 % const.NORMAL_ADJACENT_MEAN = 0; % 隣接点の法線平均 0065 % const.NORMAL_NEIGHBOR_MEAN = 1; % BV脳モデル近傍点の法線平均 0066 0067 basis_parm.normal_mode = const.NORMAL_ADJACENT_MEAN; 0068 %basis_parm.normal_mode = const.NORMAL_NEIGHBOR_MEAN; 0069 0070 % 0071 % --- Advanced parameters 0072 % Do not change, unless you understand the meaning of the parameters!! 0073 % 0074 0075 basis_parm.area_key = []; 0076 0077 % coordinate value of the head center.(1x3 on SPM_Right_m) 0078 basis_parm.Vcenter = []; 0079 0080 % Order of spherical harmonics function 0081 basis_parm.func_order = 35; 0082 % Conductivity from innermost to outermost 0083 basis_parm.sigma = [ 1.0 0.0125 1.0 ]; 0084 % Relative radius of sphere from innermost to outermost 0085 basis_parm.radius = [ 0.87 0.92 1.0 ]; 0086 0087 basis_parm.Recalc = OFF;