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<p class="MsoNormal"><span style="font-family:"Bahnschrift",sans-serif">Hi there,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Bahnschrift",sans-serif">I hope you are doing well. I am doing source analysis on Motor imagery data.
<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:-3.8pt;mso-list:l0 level1 lfo1"><span style="font-family:"Bahnschrift",sans-serif">I am using DICS beamforming to beam my ERD effect( event related desynchronization, decrease in power during movement) in 3 frequency
bands. I use standard MRI for my forward model. I get the source activations. I am interested in averaging activations in my region of interests(ROI). I used HMAT atlas from
<a href="http://lrnlab.org/">http://lrnlab.org/</a> that uses MNI . However the code gives error-<o:p></o:p></span></li></ol>
<p class="MsoNormal" style="margin-left:14.2pt"><span style="background:yellow;mso-highlight:yellow">Error using
<a href="matlab:matlab.internal.language.introspective.errorDocCallback('ft_volumelookup',%20'C:\Users\2375059k\AppData\Roaming\MathWorks\MATLAB%20Add-Ons\Collections\Fieldtrip\ft_volumelookup.m',%20248)">
<b>ft_volumelookup</b></a> (<a href="matlab:%20opentoline('C:\Users\2375059k\AppData\Roaming\MathWorks\MATLAB%20Add-Ons\Collections\Fieldtrip\ft_volumelookup.m',248,0)">line 248</a>)<br>
the mismatch between the coordinate system in the atlas and the coordinate system in the data cannot be resolved</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:14.2pt">The standard MRI has spm as the coordinate system and I read here (<a href="https://www.fieldtriptoolbox.org/faq/how_are_the_different_head_and_mri_coordinate_systems_defined/#details-of-the-mni-coordinate-system">https://www.fieldtriptoolbox.org/faq/how_are_the_different_head_and_mri_coordinate_systems_defined/#details-of-the-mni-coordinate-system</a>
)that SPM makes use of the MNI coordinate system. How can I make it work? <o:p></o:p></p>
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<li class="MsoListParagraph" style="margin-left:-3.8pt;mso-list:l0 level1 lfo1">My effect of motor imagery is in a frequency band so I use beamformer in frequency domain. But, I need a broadband source time series in regions of interest that I can use for
connectivity analysis. How can I find that? Its mentioned on Fieldtrip website to use LCMV beamforming in time domain using ft_timelockanalysis, but I don’t think there is any time locked effect in my data between different conditions, so what should be the
approach to get source time series.<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:14.2pt"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and Regards,<o:p></o:p></p>
<p class="MsoNormal">Radha<o:p></o:p></p>
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