Abstract
Purpose
Interventional MRI has significant potential for image guidance of iliac angioplasty and related vascular procedures. A technology framework with in-room image display, control, communication and MRI-guided intervention techniques was designed and tested for its potential to provide safe, fast and efficient MRI-guided angioplasty of the iliac arteries.
Methods
A 1.5-T MRI scanner was adapted for interactive imaging during endovascular procedures using new or modified interventional devices such as guidewires and catheters. A perfused vascular phantom was used for testing. Pre-, intra- and post-procedural visualization and measurement of vascular morphology and flow was implemented. A detailed analysis of X-ray fluoroscopic angiography workflow was conducted and applied. Two interventional radiologists and one physician in training performed 39 procedures. All procedures were timed and analyzed.
Results
MRI-guided iliac angioplasty procedures were successfully performed with progressive adaptation of techniques and workflow. The workflow, setup and protocol enabled a reduction in table time for a dedicated MRI-guided procedure to 6 min 33 s with a mean procedure time of 9 min 2 s, comparable to the mean procedure time of 8 min 42 s for the standard X-ray-guided procedure.
Conclusions
MRI-guided iliac vascular interventions were found to be feasible and practical using this framework and optimized workflow. In particular, the real-time flow analysis was found to be helpful for pre- and post-interventional assessments. Design optimization of the catheters and in vivo experiments are required before clinical evaluation.
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Acknowledgments
We thank Leonard Fass and John Ferrut as well as Tom Breslin and Gabor Mizsei for their friendly and helpful support. We are in particular grateful for the help and input from Patricia Seifert, Bernhard Uihlein and Paul Borm. The authors are thankful for financial assistance provided by the FUSIMO (‘Patient-specific modeling and simulation of focused ultrasound in moving organs’) project funded under the European Community’s Seventh Framework Programme (FP7/2007–2013) for Research and Technological Development under Grant Agreement no 270186. The Marie Curie Initial Training Network supported this work, and the Integrated Interventional Imaging Operating System (IIIOS) project has received funding from the European Community’s Seventh Framework Programme (FP7/2007–2013) under Grant Agreement no 238802.
Conflict of interest
The Integrated Interventional Imaging Operating System (IIIOS) project has received funding from the European Community’s Seventh Framework Programme (FP7/2007–2013) under Grant Agreement no 238802. Martin A. Rube, Fabiola Fernandez-Gutierrez, Mahsa Fatahi, Benjamin F. Cox and Andrew B. Holbrook have received funding from the European Union (IIIOS project). Andrew B. Holbrook has also received funding from the following grants NIH R01-CA121163 and P01-CA159992. Helen McLeod has received funding from the European Union (FUSIMO project, Grant Agreement no 270186). Richard D. White has no conflicts of interest. Graeme J. Houston is director, shareholder, patent holder and receives royalty at Tayside Flow Technologies Ltd. Andreas Melzer is consultant and shareholder at INNOMEDIC GmbH, Herxheim, Germany.
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Rube, M.A., Fernandez-Gutierrez, F., Cox, B.F. et al. Preclinical feasibility of a technology framework for MRI-guided iliac angioplasty. Int J CARS 10, 637–650 (2015). https://doi.org/10.1007/s11548-014-1102-0
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DOI: https://doi.org/10.1007/s11548-014-1102-0