Krishna N Kurpad1, Orhan Unal. 1. Department of Radiology, University of Wisconsin, Madison, WI, USA. kurpad@wisc.edu
Abstract
PURPOSE: To demonstrate the feasibility of using a single intravascular radiofrequency (RF) probe connected to the external magnetic resonance imaging (MRI) system via a single coaxial cable to perform active tip tracking and catheter visualization and high signal-to-noise ratio (SNR) intravascular imaging. MATERIALS AND METHODS: A multimode intravascular RF coil was constructed on a 6F balloon catheter and interfaced to a 1.5T MRI scanner via a decoupling circuit. Bench measurements of coil impedances were followed by imaging experiments in saline and phantoms. RESULTS: The multimode coil behaves as an inductively coupled transmit coil. The forward-looking capability of 6 mm was measured. A greater than 3-fold increase in SNR compared to conventional imaging using optimized external coil was demonstrated. Simultaneous active tip tracking and catheter visualization was demonstrated. CONCLUSION: It is feasible to perform 1) active tip tracking, 2) catheter visualization, and 3) high SNR imaging using a single multimode intravascular RF coil that is connected to the external system via a single coaxial cable.
PURPOSE: To demonstrate the feasibility of using a single intravascular radiofrequency (RF) probe connected to the external magnetic resonance imaging (MRI) system via a single coaxial cable to perform active tip tracking and catheter visualization and high signal-to-noise ratio (SNR) intravascular imaging. MATERIALS AND METHODS: A multimode intravascular RF coil was constructed on a 6F balloon catheter and interfaced to a 1.5T MRI scanner via a decoupling circuit. Bench measurements of coil impedances were followed by imaging experiments in saline and phantoms. RESULTS: The multimode coil behaves as an inductively coupled transmit coil. The forward-looking capability of 6 mm was measured. A greater than 3-fold increase in SNR compared to conventional imaging using optimized external coil was demonstrated. Simultaneous active tip tracking and catheter visualization was demonstrated. CONCLUSION: It is feasible to perform 1) active tip tracking, 2) catheter visualization, and 3) high SNR imaging using a single multimode intravascular RF coil that is connected to the external system via a single coaxial cable.
Authors: Harald H Quick; Hilmar Kuehl; Gernot Kaiser; Stephanie Aker; Silke Bosk; Jörg F Debatin; Mark E Ladd Journal: Radiology Date: 2003-09-18 Impact factor: 11.105
Authors: Sven Zuehlsdorff; Reiner Umathum; Steffen Volz; Peter Hallscheidt; Christian Fink; Wolfhard Semmler; Michael Bock Journal: Magn Reson Med Date: 2004-07 Impact factor: 4.668
Authors: Madhav Venkateswaran; Orhan Unal; Samuel Hurley; Alexey Samsonov; Peng Wang; Sean B Fain; Krishna N Kurpad Journal: IEEE Trans Biomed Eng Date: 2016-03-04 Impact factor: 4.538