Highly Efficient 3D Tracking & Visualization of Loopless Active MRI Devices using Slice-Direction-Dephased, Undersampled Projection Imaging

Ashvin Kurian George¹, J. Andrew Derbyshire¹, Michael S. Hansen¹, Christina E. Saikus¹, Ozgur Kocaturk¹, Robert J. Lederman¹, Anthony Z. Faranesh¹

We introduce a method to track the 3D curve of a moving active interventional device with a loopless-coil design. The goal is to collect small amounts of tracking data in between the data collection required for the reconstruction of multiple slices in the real-time display. The tracking data consists of two highly undersampled projection images of the device. We are able to achieve a greater data reduction than all previous methods by using slice-direction-dephased projection images of the device and optimal in-plane rotation.