Scott B. King1, Jesse Bellec2, Vyacheslav Volotovskyy1, Hung-Yu Lin1, Christopher P. Bidinosti2, Krzysztof Jasinski3, Mike J. Smith1, Boguslaw Tomanek4
1Institute for Biodiagnostics, National Research Council of Canada, Winnipeg, Manitoba, Canada; 2Department of Physics, University of Winnipeg, Winnipeg, Manitoba, Canada; 3Department of Magnetic Resonance Imaging, Polish Academy of Sciences, H. Niewodniczanski Institute of Nuclear Physics, Krakow, Poland; 4Institute for Biodiagnostics (West), National Research Council of Canada, Calgary, Alberta, Canada
High spatial resolution vessel/cavity wall MRI requires a signal-to-noise ratio much higher than can be achieved using external phased array coils, so intravascular RF coils are used directly adjacent to the vessel of interest. Concentric birdcage designs are interesting in that they maintain the longitudinal SNR coverage, but also demonstrate some radial homogeneity albeit with azimuthal asymmetries that may not be ideal. Multi-turn crossed loops are another good design retaining the forward looking capability and orientation independence previously reported, but now with good longitudinal SNR coverage. These designs may offer alternatives to the low SNR opposed solenoid design.