    origin = input('Is the origin of the coordinate system at the a(nterior commissure), i(nterauricular), s(scanner origin), n(ot a landmark)? ', 's');
        tmp = sens.tra(:, strcmp(sens.optotype, 'transmitter')); correctT = all(tmp(:)>=0);
        tmp = sens.tra(:, strcmp(sens.optotype, 'receiver'   )); correctR = all(tmp(:)<=0);
        if ~correctT
        if ~correctR
  [pth,nam,ext] = fileparts(fname);
  V  = nifti(fullfile(pth,['iy_',nam,ext]));
  [pth,nam,ext] = fileparts(fname);
  V  = nifti(fullfile(pth,['y_',nam,ext]));
 eary  = [.0555 .0775 .0783 .0746 .0555 -.0055 -.0932 -.1313 -.1384 -.1199];
    outline{3} = [ earx(:)  eary(:)];
    outline{4} = [-earx(:)  eary(:)];