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clarify acq param use in MEG
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@sappelhoff
sappelhoff committed Apr 26, 2019
1 parent e056e73 commit b5cb025
Showing 1 changed file with 7 additions and 3 deletions.
10 changes: 7 additions & 3 deletions src/04-modality-specific-files/02-magnetoencephalography.md
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Expand Up @@ -18,8 +18,8 @@ Template:
sub-<label>/
[ses-<label>]/
meg/
sub-<label>[_ses-<label>]_task-<label>[_acq-<label>][_run-<index>][_proc-<label>]_meg.<manufacturer_specific_extension>
[sub-<label>[_ses-<label>]_task-<label>[_acq-<label>][_run-<index>][_proc-<label>]_meg.json]
sub-<label>[_ses-<label>]_task-<label>[_run-<index>][_proc-<label>]_meg.<manufacturer_specific_extension>
[sub-<label>[_ses-<label>]_task-<label>[_run-<index>][_proc-<label>]_meg.json]
```

Unprocessed MEG data MUST be stored in the native file format of the MEG
Expand Down Expand Up @@ -178,7 +178,7 @@ Template:
sub-<label>/
[ses-<label>]/
meg/
[sub-<label>[_ses-<label>]_task-<label>[_acq-<label>][_run-<index>][_proc-<label>]_channels.tsv]
[sub-<label>[_ses-<label>]_task-<label>[_run-<index>][_proc-<label>]_channels.tsv]
```

This file is RECOMMENDED as it provides easily searchable information across
Expand Down Expand Up @@ -373,6 +373,10 @@ taped to the skin. Please note that the photos may need to be cropped or blurred
to conceal identifying features prior to sharing, depending on the terms of the
consent form signed by the participant.

The `acq` parameter can be used to indicate acquisition of different photos of
the same face (or other body part in different angles to show, for example, the
location of the nasion (NAS) as opposed to the right periauricular point (RPA).

Example of the NAS fiducial placed between the eyebrows, rather than at the
actual anatomical nasion: `sub-0001_ses-001_acq-NAS_photo.jpg`

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2 comments on commit b5cb025

@Moo-Marc
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I haven't found a discussion on this removal of acq (did I miss it?), so I'll comment here. We were using it to identify "duplicate" continuous raw CTF MEG recordings. There is an option when recording CTF data to have one copy saved in epochs and one copy saved continuous (named with an additional "AUX" in the file name). I believe this falls under the proper usage of the acq parameter.

@sappelhoff
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Hi @Moo-Marc, the discussions happened in #173 #188 and #194

I am sorry you missed it, and I advise you to open your thought in a new issue so that it will have a better visibility for the community.

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