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fix link syntax
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sappelhoff committed Aug 31, 2020
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42 changes: 21 additions & 21 deletions src/04-modality-specific-files/02-magnetoencephalography.md
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Expand Up @@ -100,27 +100,27 @@ Specific MEG fields MUST be present:

SHOULD be present:

| Field name | Definition |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| MEGChannelCount | RECOMMENDED. Number of MEG channels (e.g. 275) |
| MEGREFChannelCount | RECOMMENDED. Number of MEG reference channels (e.g. 23). For systems without such channels (e.g. Neuromag Vectorview), `MEGREFChannelCount`=0 |
| EEGChannelCount | RECOMMENDED. Number of EEG channels recorded simultaneously (e.g. 21) |
| ECOGChannelCount | RECOMMENDED. Number of ECoG channels |
| SEEGChannelCount | RECOMMENDED. Number of SEEG channels |
| EOGChannelCount | RECOMMENDED. Number of EOG channels |
| ECGChannelCount | RECOMMENDED. Number of ECG channels |
| EMGChannelCount | RECOMMENDED. Number of EMG channels |
| MiscChannelCount | RECOMMENDED. Number of miscellaneous analog channels for auxiliary signals |
| TriggerChannelCount | RECOMMENDED. Number of channels for digital (TTL bit level) triggers |
| RecordingDuration | RECOMMENDED. Length of the recording in seconds (e.g. 3600) |
| RecordingType | RECOMMENDED. Defines whether the recording is `continuous` or `epoched`; this latter limited to time windows about events of interest (e.g., stimulus presentations, subject responses etc.) |
| EpochLength | RECOMMENDED. Duration of individual epochs in seconds (e.g. 1) in case of epoched data |
| ContinuousHeadLocalization | RECOMMENDED. Boolean (`true` or `false`) value indicating whether continuous head localisation was performed. |
| HeadCoilFrequency | RECOMMENDED. List of frequencies (in Hz) used by the head localisation coils (‘HLC’ in CTF systems, ‘HPI’ in Elekta, ‘COH’ in BTi/4D) that track the subject’s head position in the MEG helmet (e.g. `[293, 307, 314, 321]`) |
| MaxMovement | RECOMMENDED. Maximum head movement (in mm) detected during the recording, as measured by the head localisation coils (e.g., 4.8) |
| SubjectArtefactDescription | RECOMMENDED. Freeform description of the observed subject artefact and its possible cause (e.g. "Vagus Nerve Stimulator", "non-removable implant"). If this field is set to `n/a`, it will be interpreted as absence of major source of artifacts except cardiac and blinks. |
| AssociatedEmptyRoom | RECOMMENDED. Relative path in BIDS folder structure to empty-room file associated with the subject’s MEG recording. The path needs to use forward slashes instead of backward slashes (e.g. `sub-emptyroom/ses-/meg/sub-emptyroom_ses-_task-noise_run-_meg.ds`). |
| HardwareFilters | RECOMMENDED. [Object] of temporal hardware filters applied, or `"n/a"` if the data is not available. Each key:value pair in the JSON object is a name of the filter and an object in which its parameters are defined as key:value pairs. E.g., `{"Highpass RC filter": {"Half amplitude cutoff (Hz)": 0.0159, "Roll-off": "6dB/Octave"}}` |
| Field name | Definition |
| -------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| MEGChannelCount | RECOMMENDED. Number of MEG channels (e.g. 275) |
| MEGREFChannelCount | RECOMMENDED. Number of MEG reference channels (e.g. 23). For systems without such channels (e.g. Neuromag Vectorview), `MEGREFChannelCount`=0 |
| EEGChannelCount | RECOMMENDED. Number of EEG channels recorded simultaneously (e.g. 21) |
| ECOGChannelCount | RECOMMENDED. Number of ECoG channels |
| SEEGChannelCount | RECOMMENDED. Number of SEEG channels |
| EOGChannelCount | RECOMMENDED. Number of EOG channels |
| ECGChannelCount | RECOMMENDED. Number of ECG channels |
| EMGChannelCount | RECOMMENDED. Number of EMG channels |
| MiscChannelCount | RECOMMENDED. Number of miscellaneous analog channels for auxiliary signals |
| TriggerChannelCount | RECOMMENDED. Number of channels for digital (TTL bit level) triggers |
| RecordingDuration | RECOMMENDED. Length of the recording in seconds (e.g. 3600) |
| RecordingType | RECOMMENDED. Defines whether the recording is `continuous` or `epoched`; this latter limited to time windows about events of interest (e.g., stimulus presentations, subject responses etc.) |
| EpochLength | RECOMMENDED. Duration of individual epochs in seconds (e.g. 1) in case of epoched data |
| ContinuousHeadLocalization | RECOMMENDED. Boolean (`true` or `false`) value indicating whether continuous head localisation was performed. |
| HeadCoilFrequency | RECOMMENDED. List of frequencies (in Hz) used by the head localisation coils (‘HLC’ in CTF systems, ‘HPI’ in Elekta, ‘COH’ in BTi/4D) that track the subject’s head position in the MEG helmet (e.g. `[293, 307, 314, 321]`) |
| MaxMovement | RECOMMENDED. Maximum head movement (in mm) detected during the recording, as measured by the head localisation coils (e.g., 4.8) |
| SubjectArtefactDescription | RECOMMENDED. Freeform description of the observed subject artefact and its possible cause (e.g. "Vagus Nerve Stimulator", "non-removable implant"). If this field is set to `n/a`, it will be interpreted as absence of major source of artifacts except cardiac and blinks. |
| AssociatedEmptyRoom | RECOMMENDED. Relative path in BIDS folder structure to empty-room file associated with the subject’s MEG recording. The path needs to use forward slashes instead of backward slashes (e.g. `sub-emptyroom/ses-/meg/sub-emptyroom_ses-_task-noise_run-_meg.ds`). |
| HardwareFilters | RECOMMENDED. [Object][] of temporal hardware filters applied, or `"n/a"` if the data is not available. Each key:value pair in the JSON object is a name of the filter and an object in which its parameters are defined as key:value pairs. E.g., `{"Highpass RC filter": {"Half amplitude cutoff (Hz)": 0.0159, "Roll-off": "6dB/Octave"}}` |

Specific EEG fields (if recorded with MEG) SHOULD be present:

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