Optical Topography is a non-invasive tool for the investigation of cerebral hemodynamics using near-infrared spectroscopy (NIRS). The technologyexploits the different absorption spectra of oxygenated and deoxygenated hemoglobin in the near infrared region and thus opens a new window to the human brain. After positioning the easy-
to-use probes on the head of the subject, the ETG-4000 system from Hitachi allows the simultaneous measurement at multiple brain sites and provides real-time images of changes in hemoglobin concentration in the brain. Minimal restraints make the subject feel comfortable in an environment controlled by the operator. The ETG-4000 is a compact and mobile unit that can be easily moved from site to site. The user-friendly on-screen application software guides the user conveniently through the operation, from experimental design to data acquisition, from data analysis to data export. Serial, digital and analog ports allow the ETG-4000 to send and receive triggers to efficiently communicate with other modalities. Simultaneous measurements can be conveniently synchronized and conducted either by direct communication between the two modalities (via triggers) by remote-controlling both modalities through an external PC.
Hitachi Medical Systems Europe
Zug, Switzerland,