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Heating of Large Endovascular Stents and Stent Grafts in Magnetic Particle Imaging-Influence of Measurement Parameters and Isocenter Distance.
Wegner, Franz; von Gladiss, Anselm; Wei, Huimin; Behrends, André; Grzyska, Ulrike; Sieren, Malte M; Haegele, Julian; Graeser, Matthias; Buzug, Thorsten M; Barkhausen, Joerg; Friedrich, Thomas.
Afiliación
  • Wegner F; Department of Radiology and Nuclear Medicine, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany. franz.wegner@uksh.de.
  • von Gladiss A; Institute for Computational Visualistics, University of Koblenz-Landau, Universitätsstraße 1, 56070, Koblenz, Germany.
  • Wei H; Institute of Medical Engineering, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
  • Behrends A; Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE, Mönkhofer Weg 239a, 23562, Lübeck, Germany.
  • Grzyska U; Department of Radiology and Nuclear Medicine, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
  • Sieren MM; Department of Radiology and Nuclear Medicine, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
  • Haegele J; Zentrum für Radiologie und Nuklearmedizin, Von-Werth-Straße 5, 41515, Grevenbroich, Germany.
  • Graeser M; Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE, Mönkhofer Weg 239a, 23562, Lübeck, Germany.
  • Buzug TM; Institute of Medical Engineering, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
  • Barkhausen J; Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE, Mönkhofer Weg 239a, 23562, Lübeck, Germany.
  • Friedrich T; Department of Radiology and Nuclear Medicine, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
Cardiovasc Intervent Radiol ; 46(3): 392-399, 2023 Mar.
Article en En | MEDLINE | ID: mdl-36513764
PURPOSE: Magnetic particle imaging (MPI) is a tomographic imaging modality with the potential for cardiovascular applications. In this context, the extent to which stents are heated should be estimated from safety perspective. Furthermore, the influence of the measurement parameters and stent distance to the isocenter of the MPI scanner on stent heating were evaluated. MATERIALS AND METHODS: Nine different endovascular stents and stent grafts were tested in polyvinyl-chloride tubes. The stents had diameters from 10 to 31 mm, lengths between 25 and 100 mm and were made from stainless steel, nitinol or cobalt-chromium. The temperature differences were recorded with fiber-optic thermometers. All measurements were performed in a preclinical commercial MPI scanner. The measurement parameters were varied (drive field strengths: 3, 6, 9, 12 mT and selection field gradients: 0, 1.25 and 2.5 T/m). Furthermore, measurements with different distances to the scanner's isocenter were performed (100 to 0 mm). RESULTS: All stents showed heating (maximum 53.1 K, minimum 4.6 K). The stent diameter directly correlated with the temperature increase. The drive field strength influenced the heating of the stents, whereas the selection field gradient had no detectable impact. The heating of the stents decreased with increasing distance from the scanner's isocenter and thus correlated with the loss of the scanner's magnetic field. CONCLUSION: Stents can cause potentially harmful heating in MPI. In addition to the stent diameter and design, the drive field strength and the distance to the MPI scanner's isocenter must be kept in mind as influencing parameters.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tomografía / Stents / Procedimientos Endovasculares / Calefacción Límite: Humans Idioma: En Revista: Cardiovasc Intervent Radiol Año: 2023 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tomografía / Stents / Procedimientos Endovasculares / Calefacción Límite: Humans Idioma: En Revista: Cardiovasc Intervent Radiol Año: 2023 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos