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<p class="MsoNormal">Hello all!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">I am attempting to use an fMRI cluster as an ROI to look at virtual electrode timecourses post-beamforming.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">I have been using the aal atlas to find virtual electrodes of maximum change between baseline and stimulus period within, for example, the motor cortex afer beamforming. However, the virtual electrodes
found are not necessarily in a position similar to that of the fMRI cluster and I’d like to be more specific than that if possible.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">The template grid I have been using for beamforming is created from the T1 (code as below, in MNI space: …</span>fieldtrip\external/spm8/templates/T1.nii<span style="mso-fareast-language:EN-GB">).
Is it possible to transform an fMRI cluster (in MNI space) onto the template grid so that the data from specific grid points relating to that cluster can be extracted post-beamforming??
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Any help with this would be great!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Ross<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">%%%tempale grid creation<o:p></o:p></span></p>
<p class="MsoNormal">T1 = ft_read_mri('F:\fieldtrip\external/spm8/templates/T1.nii');<o:p></o:p></p>
<p class="MsoNormal">T1.coordsys = 'spm';<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">cfg = [];<o:p></o:p></p>
<p class="MsoNormal">template_seg = ft_volumesegment(cfg, T1);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">cfg = [];<o:p></o:p></p>
<p class="MsoNormal">cfg.method = 'singleshell';<o:p></o:p></p>
<p class="MsoNormal">template_vol = ft_prepare_headmodel(cfg, template_seg);<o:p></o:p></p>
<p class="MsoNormal">template_vol = ft_convert_units(template_vol, 'cm'); <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">cfg = [];<o:p></o:p></p>
<p class="MsoNormal">cfg.grid.xgrid = -20:0.5:20;<o:p></o:p></p>
<p class="MsoNormal">cfg.grid.ygrid = -20:0.5:20;<o:p></o:p></p>
<p class="MsoNormal">cfg.grid.zgrid = -20:0.5:20;<o:p></o:p></p>
<p class="MsoNormal">cfg.grid.unit = 'cm';<o:p></o:p></p>
<p class="MsoNormal">cfg.grid.tight = 'yes';<o:p></o:p></p>
<p class="MsoNormal">cfg.inwardshift = 0.15;<o:p></o:p></p>
<p class="MsoNormal">cfg.vol = template_vol;<o:p></o:p></p>
<p class="MsoNormal">template_grid = ft_prepare_sourcemodel(cfg);<o:p></o:p></p>
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