Robert R. Edelman1,2, Wei Li, Anthony Farrell,
Eugene Dunkle, Ioannis Koktzoglou,3
1Radiology, NorthShore
University HealthSystem, Evanston, IL, United States; 2Radiology,
Northwestern University, Chicago, IL, United States; 3Radiology,
University of Chicago, Chicago, IL, United States
A hybrid catheter design for passive MR-guided interventions which enables dual contrast mechanisms has been implemented based on a standard angiographic catheter. It uses deposits of an iron oxide-containing compound to enable thick slice dynamic imaging with a T2*-weighted acquisition having a frame rate of 2Hz. An outer coating of gadolinium-doped latex enables static imaging with high spatial resolution using a T1-weighted dual echo 3D radial acquisition. Although latex has not previously been used for passive catheter tracking, it was found to produce high catheter conspicuity on T1-weighted dual echo UTE images, which was further enhanced by image subtraction.