Figure 5.

A promising technique (reverse polarization) to impart "signatures" to inductively-coupled intravascular devices. This is tested in a phantom using phased-array surface coils and real-time MRI. (A) Forward polarized mode shows the catheter and background. (B) Reverse polarization method distinguishes the inductively coupled receiver from background. The signal can be colorized and overlaid (C) as if it were an active catheter using a separate receiver chain. Courtesy Ergin Atalar, Bilkent University.