RFID STENT TAG Senses Vessel's State

摘要

Rf-identification (rfid) technology has the potential to provide information beyond logistics, such as a physical state and its time-evolution. Essentially, the tag may act as a self-sensing device, thanks to the dependence of its input impedance and radar cross section (RCS) on the physical and geometrical features of the tagged object or-in general-the close surrounding environment. Among the advantages to this approach is that it does not require any specific embedded sensor or local power supply. At Italy's DISP-University of Roma Tor Vergata, a team of researchers has extended this idea to implanted antennas. The team's goal was to sense the evolution of a physiological and pathological process involving a local change of effective permittivity inside the body.