Optical Topography

New light shed on the human brain

Optical Topography is a non-invasive tool for the investigation of cerebral hemodynamics using near-infrared spectroscopy (NIRS). Optical Topography makes it possible to get a glimpse of the working brain like never before by exploiting the different absorption spectra of oxygenated and deoxygenated hemoglobin in the near-infrared region of light. The technology opens a new window to the secrets of the human brain.

Non-invasive, real-time measurements of brain activity

After positioning the easy-to-use probes on the head, the ETG-4000 allows the simultaneous measurement of changing hemoglobin concentrations at multiple brain sites in real-time. Minimal restraints make the subject feel comfortable in an environment controlled by the operator.

Simultaneous measurements of up to 52 channels at brain sites of your choice

The choice between an array of of probe configurations of different sizes and number of measurement channels (24 – 52) makes the ETG-4000 the ideal tool in neurosciences.

Compact, mobile and user-friendly

The ETG-4000 is a compact and mobile unit that can be easily moved from site to site. The convenient, user-friendly on-screen application software guides the user through the operation – from experimental design to data acquisition, from data analysis to data export and presentation.

Simultaneous multi-modality measurements

Serial, digital and analog ports enable the ETG-4000 to send and receive triggers and communicate with other modalities. Simultaneous measurements (NIRS/fMRI, NIRS/EEG, NIRS/TMS, NIRTS/eye-tracking, etc.) can be synchronized either through direct communication between the modalities (triggering) or by remote-control of both modalities through an external PC*.

The ETG-4000, the All-in-One Solution

A user-friendly interface guides the operator through the entire process, from experiment to data export.

Multi-modal display of real-time data acquisition (channel-by-channel, 2D-mapped….)

The ETG-4000 allows a flexible paradigm design, either in the monitoring “Event”- or the programmable “Stimulus” mode.

An array of analytical tools to improve data quality is available (band-pass filtering, moving average, integral, PCA, group analysis, wave analysis, etc.).

Raw data can be conveniently analyzed with the built-in analysis tools or they can be exported via a LAN-connection as CSV-files for further analysis with independent analysis software; the LAN-connection also provides a convenient way to export hemoglobin raw data in real-time.

The exported data (CSV-file format) are ready for import into secondary analysis software; no further formatting is required.

The various data displays can be exported either as still images (bmp) or animated video clips (AVI).

  • * The external PC has to be provided by the user.