A safe and practical guide wire for use during passive tracking in endovascular interventional procedures
Seppenwoolde J, Bartels L, Peeters J, Bakker C
University Medical Center Utrecht
The lack of an MR-dedicated guide wire has seriously hampered the development of endovascular interventional MRI. We present such a wire designed for tracking with susceptibility-based passive device visualization. This technique is safe and resembles existing clinical procedures. A prototype was developed, consisting of a Nitinol tip segment with stainless steel 410 markers and a plastic base. This prototype was tested in in vitro and in vivo animal experiments aimed at catheterization of the renal and hepatic arteries. Depiction of the guide wire was excellent at various tracking speeds. Its mechanical properties were sufficient for use in MR-guided endovascular interventions.