Configuring Epilepsy Analysis: Difference between revisions
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====Dipole Fit==== |
====Dipole Fit==== |
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Set the time, epoch, and duration of dipole fit |
Set the time, epoch, and duration of dipole fit |
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Possibly better to set latencies for fits and run through the commandline dipole fit |
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Commandline dipole fit |
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dfit -a -z -b -0.010 -e 0.010 -h $ds_Filename/default.hdm -f default.dip -m $MarkerName $ds_Filename Output |
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Revision as of 09:57, 19 November 2019
UNDER CONSTRUCTION***
After installing and configuring the analysis machine: https://megcore.nih.gov/index.php/Configuring_analysis_machine
Configuration Files
default.dip : used as input to the dipoleFit and dfit programs as the default starting options for dipole fit processing.cfg : used to preprocess the data for viewing channelset.cfg : Montage Creation (ordering channels is done through virtual channels) default.vc : Virtual Channel Creation
Configuring Data Editor Layout
Configurations are stored in the ChannelSet.cfg file. Current Montages Include:
- MEG_LCR_22
- MEG_LCR_22_EEG_LCR_21
- EEG_
Creating a View Montage
The data editor layout orders the channels by acquisition order and may not be preferred
To create ordered channels, a virtual channel dataset will need to be created
DataEditor >> Edit >> Virtual Channels Select a virtual channel and add to Plus Box >> Name the new channel (it must be different from acquisition names - choose lowercase or uppercase as a workaround) Save the virtual channel .vg file to $HOME/.meg/resources/default.vg
Head Model
Preferred Method - Multisphere model from inner skull approximation
orthohull #Realigns the MRI to match the MEG subject head space (origin is midpoint between LPA/RPA and other axis runs through the nasion) #Also creates an inner skull approximation using the inflated/smoothed brain surface localSperes -d $Dataset -s multisphere.shape
Manual Method - Single Shell based on scalp
MRIConvert >> imports mri into ctf format MRIViewer -mri CTF.mri >> creates headshape and headmodel >> save to default.hdm Dipolefit -hdm default.hdm
Dipole Fit
Set the time, epoch, and duration of dipole fit
Commandline dipole fit dfit -a -z -b -0.010 -e 0.010 -h $ds_Filename/default.hdm -f default.dip -m $MarkerName $ds_Filename Output
Processing Pipeline
check tags >> cat anat+ortho.HEAD | grep TAGSET_LABELS 3dtagalign << avghc.py << creates an average head position changeHeadPos << rewrites the head position