Melvyn B. Ooi1, Murat Aksoy1, Ronald D. Watkins1, Roland Bammer1
1Department of Radiology, Stanford University, Stanford, CA, United States
The ability to track the positions of multiple micro RF-coil “active markers” in the MRI scanner has been the foundation of several recent advances in MR-guided intervention, as well as motion correction applications. The current work demonstrates that un-tuned markers, while simplifying coil design and reducing unwanted RF-related effects, provide sufficient signal for accurate/precise position tracking measurements in a temporal resolution suitable for use in real-time applications. A series of position measurements using un-tuned and tuned markers are performed on a well-defined grid-phantom for comparison.