Design of a system for contact-free measurement of the conductivity of biological tissue.

摘要: The electrical impedance of tissue can give important informations about the viability tissue. A non-invasive and contact-free measuring system using an inductive sensor is presented. Using a single pick-up coil not sensitive enough for small changes in conductivity biological Employing gradiometer instead improve resolution system. developed data acquisition realized four parts: lock-in-amplifier, providing sinusoidal signal sensor, power amplifier, driving excitation preamplifier buffering reference amplifying output sensor. In this paper focus on hardware that was set up. Results measurements inhomogeneous phantoms are shown.