Importing OPM MEG data

Requests
1

Hello,

Is there a way to analyze OPM-MEG data in brainstorm ? i tried to open the dataset provided by MNE here: Optically pumped magnetometer (OPM) data — MNE 1.10.0 documentation

but I get the following error:

BST> Error: Could not find measurement data: 
Error using fiff_read_meas_info
Could not find measurement data


***************************************************************************
** Error: Line 245:  in_fopen
** Cannot open data file: 
** /Users/edelaire1/mne_data/MNE-OPM-data/MEG/OPM/OPM_sample-fwd.fif
** 
** Call stack:
** >in_fopen.m at 245
** >import_raw.m at 132
** >bst_call.m at 28
** >tree_callbacks.m>@(h,ev)bst_call(@import_raw,[],[],iSubject) at 684
** 
***************************************************************************

	9 MEG channel locations transformed
	9 MEG channel locations transformed
	105 coil definition templates available

***************************************************************************
** Error: Line 147:  mne_add_coil_defs
** Could not find an MEG coil template (coil type = 9999 accuracy = 1) for channel MEG1111
** 
** Call stack:
** >mne_add_coil_defs.m at 147
** >in_channel_fif.m at 187
** >in_fopen_fif.m at 108
** >in_fopen.m at 68
** >import_raw.m at 132
** >bst_call.m at 28
** >tree_callbacks.m>@(h,ev)bst_call(@import_raw,[],[],iSubject) at 684
** 
***************************************************************************

Edouard

2

Since OPM data (specially the one stored as .fif) and shares similarities with cryogenic MEG, so in some cases, files from OPM may load correctly. However, full compatibility is not yet guaranteed, and you may encounter issues, like the reported here.

Improved and more robust support OPM is on our development roadmap.

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