nirs

A trick to detect bad channel in NIRS data…

Some noise is easy to detect – simply plotting the time courses of NIRS signal, you will find the noise so out of range...
Xu Cui
35 sec read

Near Infrared Spectroscopy (NIRS): List of manufactures

This post is under updating … The information is not complete Table can be found here: https://spreadsheets.google.com/spreadsheet/ccc?key=0AmI1wIXzRozHdFQzWHNQajI5eTlOeWRFd0tCT0hwYmc&hl=en_US Artinis OctaMon The main...
Xu Cui
2 min read

What does a wavelet transform plot tell you?

Let’s say you collected some brain data (time series) using NIRS while the participants were performing a task (say finger tapping), and you use...
Xu Cui
1 min read

Handy programs to visualize NIRS data (5): plot2

Let’s say you have two correlated variables, x and y. You may have more then one data points with x=10 and y=5. But if...
Xu Cui
31 sec read

Handy programs to visualize NIRS data (4): wt

In case you need to visualize your time series in both time and frequency domain (or just frequency domain), you can use the wt...
Xu Cui
33 sec read

Handy programs to visualize NIRS data (3): plotFFT

Sometimes you wish to know the spectrum of a time series. plotFFT is a handy function for this purpose. You instantly know the power...
Xu Cui
11 sec read

Handy programs to visualize NIRS data (2): plotTopoMap

Often you need to view the spatial pattern of activation as in the example below. plotTopoMap allows you to do that. It probably only...
Xu Cui
37 sec read

Handy programs to visualize NIRS data (1): plotTraces

You often need to plot the time series of NIRS signal from all channels with event indicators (See the example below). plotTraces can do...
Xu Cui
26 sec read

How to control ETG-4000 and receive realtime feedback simultaneously?

If you want to control ETG-4000 with your program through the serial port, and at the same time your experiment requires realtime feedback from...
Xu Cui
19 sec read

Realtime feedback from NIRS recording

Hitachi provides a Matlab script (RealtimeOT.m) which can deliver real-time feedback from ETG-4000. This script is installed in the computer (Windows 2000) in the...
Xu Cui
2 min read