Respiration (resp)

Following the BIDS Physiological recordings specification, M-BIDS uses the following additional Calibench requirements for respiratory data.

In addition to the BIDS _physio.tsv.gz / _physio.json pair, respiration data MUST use the recording label resp and should be organized as follows:

physio/
├── sub-<participant_label>_task-acquisition_recording-resp_physio.json
└── sub-<participant_label>_task-acquisition_recording-resp_physio.tsv.gz

Column names in the resp data files MUST be timestamp followed by resp for experiments involving single recordings. For different types of respiratory measurements, use timestamp followed by resp1, resp2, resp3, and so on.

These fields MUST be included in the JSON sidecar file: <matches>_recording-resp_physio.json

Additional Metadata Fields

Table 1: Required respiration-specific JSON fields

Key	Description	Data Type	Possible Values
SensorType	Type of sensors used for the respiratory measurements	Text	Bellows, Cushion, Strain Gauges,…
Placement	Placement of the respiratory measurement device	Text	Chest

Example TSV Data File

Compressed *.tsv.gz files are headerless. The columns are defined by the JSON sidecar.

0.0 0.0347900390625
0.0004999999999881766       0.03509521484375
0.0009999999999763531       0.0347900390625
. . .

In this example, the sidecar Columns value is ["timestamp", "resp"].

Example JSON Sidecar

{
    "Columns": [
        "timestamp",
        "resp"
    ],
    "Manufacturer": "Biopac Systems",
    "ManufacturersModelName": "ECG100C",
    "DeviceSerialNumber": "1711008598",
    "SoftwareVersion": "Biopac AcqKnowledge 5.0.2",
    "StartTime": 0.0,
    "PhysioType": "generic",
    "timestamp": {
        "LongName": "Time",
        "Description": "a continuously increasing identifier of the sampling time registered by the device",
        "Origin": "System startup",
        "Units": "s"
    },
    "resp": {
        "Description": "Respiratory Recording",
        "SensorType": "Belt",
        "Placement": "Chest",
        "Units": "V"
    },
    "SamplingFrequency": 2000.0,
    "TrimPoints": [
        882.7075,
        1530.7065
    ],
    "Duration": 647.999
}