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Device visibility was evaluated in a standardized water phantom at 1.5\u00a0T and 3.0\u00a0T. In a polymer-based CoA vessel phantom, 10 stent implantations were performed by novices (\n                      <jats:italic>n<\/jats:italic>\n                      =\u20096) and experts (\n                      <jats:italic>n<\/jats:italic>\n                      =\u20094), with four separate expert-led balloon dilatations. MRI-guided stent implantation was subsequently performed in five porcine models.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>All devices were visible at both field strengths, with lateral artifact widths of 5.3\u20137.8\u00a0mm for the guidewire, 20.9\u201338.5\u00a0mm for the stent delivery system, 13.1\u201319.9\u00a0mm for the expanded stents, and 17.4\u201330.5\u00a0mm for the balloon catheter. Phantom stenting duration was 10.2\u2009\u00b1\u20097.2\u00a0mins for novices and 6.2\u2009\u00b1\u20092.7\u00a0mins for experts. MRI-guided stent implantation was successfully performed in all five animals, with a mean duration of 13.6\u2009\u00b1\u20097.5\u00a0mins. In one animal, balloon post-dilatation was additionally performed as a procedural proof of concept.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>MRI-guided stent implantation for CoA is feasible within a structured multistage preclinical evaluation protocol and supports further clinical translation of radiation-free endovascular treatment.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00270-026-04642-w","type":"journal-article","created":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T19:57:34Z","timestamp":1792267054000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multistage Preclinical Evaluation of MRI-Guided Stenting for Coarctation of the Aorta using in vitro and Porcine Models"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9033-9726","authenticated-orcid":false,"given":"Denis","family":"Gholami Bajestani","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C. 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The MR Conditional guidewire and dedicated research prototypes used in this study were provided by Admedes GmbH, Bavaria Medizin Technologie GmbH, and Epflex Feinwerktechnik GmbH, companies involved in the BMBF project MR Stents. The authors declare no other competing interests.","order":1,"name":"Ethics","label":"Conflict of interest","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All applicable international, national, and\/or institutional guidelines for the care and use of animals were followed. All applicable international, national, and\/or institutional guidelines for the care and use of animals were followed. The animal protocols were reviewed and approved in 2022 by the Landesdirektion Sachsen governmental animal care and use committee (Germany) under approval number TVV 54\/21.","order":2,"name":"Ethics","label":"Ethical Approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Consent for publication was obtained for every individual person\u2019s data included in the study.","order":3,"name":"Ethics","label":"Consent for Publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"During the preparation of this work, the authors used the Grammarly Word plugin (Grammarly Inc., San Francisco, CA, USA) and ChatGPT (OpenAI, San Francisco, CA, USA) for grammar and language editing. After using these tools, the authors reviewed and edited the content as needed and take full responsibility for the final version of the publication. No content was generated by AI; the tools were used solely to improve clarity and language quality.","order":4,"name":"Ethics","label":"Declaration of Generative AI and AI-Assisted Technologies in the Writing Process","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Informed consent was obtained from all individual participants included in the study. All study participants provided written consent for the collection and processing of their data. All data used for development of the in vitro phantom were fully anonymized and provided without any personal identifiers.","order":5,"name":"Ethics","label":"Informed Consent","group":{"name":"EthicsHeading","label":"Declarations"}}]}}