Skip to main content





Hitachi's Optical Topography System is the result of continued R&D in close cooperation with researchers and clinicians and it brings near-infrared spectroscopy to a new level.  
Measurement of this system is non-invasive, and relatively restraint-free. Advanced technology and enhanced operational features make the ETG-4100 the ideal tool for monitoring cerebral blood flow.

This website includes information intended for healthcare professionals.
Please note that all descriptions in this website conform to the Pharmaceutical and Medical Device Act in Japan as well as other laws and regulations in Japan. Model names, specifications and configurations of products in overseas market outside Japan may be different by the countries.