Abstract #1249

Which Factors Influence MRI In-Stent Lumenvisibility of Coronary In-Stent Stenosis? an In-Vitro Model Investigation

Gerrit Schnwald¹, Gregor Schaefers², Georg Haltern³, Brigitte Kipfmller⁴

¹University Witten/Herdecke, Gelsenkirchen, NRW, Germany; ²MR:comp GmbH, Gelsenkirchen, Germany; ³HELIOS Heart Center , Wuppertal, Germany; ⁴University of applied Science Gelsenkirchen, Germany

Purpose Development of a standardized procedure to evaluate which factors need to be optimized for quantification of in-stent stenosis by analysis of lumenvisibility in a static MRI model of coronary in-stent stenosis. Methods Stents were placed into tubes and equipped with artificial restenosis made of a pre-investigated material. The tubes were placed in a phantom. A 1.5 and a 3 Tesla MR-system were used. Results Quantification of in-stent stenosis was limited in stainless steel stents and cobalt-chromium stents by artifacts. Tantalum stent showed a lower rate of artifacts. Conclusion Image quality was strongly depended from stent material and stent design.