TY - JOUR
AU1 - Sincic, Ryan
AU2 - Caton, Curtis
AU3 - Lillaney, Prasheel
AU4 - Goodfriend, Scott
AU5 - Ni, Jason
AU6 - Martin, Alastair
AU7 - Losey, Aaron
AU8 - Shah, Neel
AU9 - Yee, Erin
AU1 - Evans, Lee
AU1 - Malba, Vincent
AU1 - Bernhardt, Anthony
AU1 - Settecase, Fabio
AU1 - Cooke, Daniel
AU1 - Saeed, Maythem
AU1 - Wilson, Mark
AU1 - Hetts, Steven
AB - Magnetic resonance imaging (MRI) guided minimally invasive interventions are an emerging technology. We developed a microcatheter that utilizes micro-electromagnets manufactured on the distal tip, in combination with the magnetic field of a MRI scanner, to perform microcatheter steering during endovascular surgery. The aim of this study was to evaluate a user control system for operating, steering and monitoring this magnetically guided microcatheter. The magnetically-assisted remote control (MARC) microcatheter was magnetically steered within a phantom in the bore of a 1.5 T MRI scanner. Controls mounted in an interventional MRI suite, along with a graphical user interface at the MRI console, were developed with communication enabled via MRI compatible hardware modules. Microcatheter tip deflection measurements were performed by evaluating MRI steady-state free precession (SSFP) images and compared to models derived from magnetic moment interactions and composite beam mechanics. The magnitude and direction of microcatheter deflections were controlled with user hand, foot, and software controls. Data from two different techniques for measuring the microcatheter tip location within a 1.5 T MRI scanner showed correlation of magnetic deflections to our model (R2: 0.88) with a region of linear response (R2: 0.98). Image processing tools were successful in autolocating the in vivo microcatheter tip within MRI SSFP images. Our system showed good correlation to response curves and introduced low amounts of MRI noise artifact. The center of the artifact created by the energized microcatheter solenoid was a reliable marker for determining the degree of microcatheter deflection and auto-locating the in vivo microcatheter tip.
TI - System architecture for a magnetically guided endovascular microcatheter
JF - Biomedical Microdevices
DO - 10.1007/s10544-013-9809-1
DA - 2013-10-17
UR - https://www.deepdyve.com/lp/springer-journals/system-architecture-for-a-magnetically-guided-endovascular-zZSfIy0s06
SP - 97
EP - 106
VL - 16
IS - 1
DP - DeepDyve
ER -