pionirs_occlusion.ftn: 1 Hz PIONIRS NIRSBOX export

In mnirs: Muscle Near-Infrared Spectroscopy Processing and Analysis

1 Hz PIONIRS NIRSBOX export

Description

Exported from PIONIRS software at 1 Hz, one channel. Containing baseline, arterial occlusion, and recovery phases marked by event tags, from the thenar eminence (CH1).

Format

tab-separated .ftn file with 15 columns and 700 rows:

Iteration

Sample index.

Time

Elapsed time (seconds).

uA_L1, uA_L2

Absorption coefficient at wavelengths 1 (685 nm) and 2 (830 nm; cm^-1).

uS_L1, uS_L2

Reduced scattering coefficient at wavelengths 1 and 2 (cm^-1).

DPF_L1, DPF_L2

Differential pathlength factor at wavelengths 1 and 2 (\muM).

O2Hb

Oxyhaemoglobin concentration (\muM).

HHb

Deoxyhaemoglobin concentration (\muM).

THb

Total haemoglobin concentration (\muM).

StO2

Tissue oxygen saturation (%).

DQI

Data quality index (0-1).

Tag

Event marker (integer). 0 - no tag; 1 - manual tag; 2 - automatic tag from external trigger; 3 - automatic protocol- specific tag from the measurement software

TagLabel

Event label text.

Channels are detected automatically, or can be specified explicitly for read_mnirs():

• nirs_channels = c("StO2", "O2Hb", "HHb", "THb")

• time_channel = c("Time")

• event_channel = c("TagLabel")

• interval_times = list(start = 91, end = 391)

Source

PIONIRS S.r.l. (https://www.pionirs.com/)

See Also

read_mnirs(), example_mnirs()

Examples

example_mnirs("pionirs")

mnirs documentation built on Sept. 13, 2026, 1:06 a.m.