| Development and testing of passive tracking markers for different field strengths and tracking speeds. | |
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MedLine Citation:
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PMID: 16510948 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Susceptibility markers for passive tracking need to be small in order to maintain the shape and mechanical properties of the endovascular device. Nevertheless, they also must have a high magnetic moment to induce an adequate artefact at a variety of scan techniques, tracking speeds and, preferably, field strengths. Paramagnetic markers do not satisfy all of these requirements. Ferro- and ferrimagnetic materials were therefore investigated with a vibrating sample magnetometer and compared with the strongly paramagnetic dysprosium oxide. Results indicated that the magnetic behaviour of stainless steel type AISI 410 corresponds the best with ideal marker properties. Markers with different magnetic moments were constructed and tested in in vitro and in vivo experiments. The appearance of the corresponding artefacts was field strength independent above magnetic saturation of 1.5 T. Generally, the contrast-to-noise ratio decreased at increasing tracking speed and decreasing magnetic moment. Device depiction was most consistent at a frame rate of 20 frames per second. |
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Authors:
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J M Peeters; J-H Seppenwoolde; L W Bartels; C J G Bakker |
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Publication Detail:
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Type: Journal Article Date: 2006-03-01 |
Journal Detail:
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Title: Physics in medicine and biology Volume: 51 ISSN: 0031-9155 ISO Abbreviation: Phys Med Biol Publication Date: 2006 Mar |
Date Detail:
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Created Date: 2006-03-02 Completed Date: 2006-05-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401220 Medline TA: Phys Med Biol Country: England |
Other Details:
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Languages: eng Pagination: N127-37 Citation Subset: IM |
Affiliation:
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Image Sciences Institute, Department of Radiology, University Medical Center Utrecht, Heidelberglaan 100, RM Q.0S.459, 3584 CA Utrecht, The Netherlands. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Angiography
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instrumentation*,
methods Animals Balloon Dilatation / instrumentation Biological Markers Dysprosium / chemistry Ferrosoferric Oxide / chemistry Image Enhancement Image Processing, Computer-Assisted Magnetic Resonance Imaging / methods Magnetics* Models, Statistical Nickel Particle Accelerators Stainless Steel Swine Thermodynamics Time Factors Zinc / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 12597-68-1/Stainless Steel; 1308-87-8/dysprosium oxide; 1317-61-9/Ferrosoferric Oxide; 7429-91-6/Dysprosium; 7440-02-0/Nickel; 7440-66-6/Zinc |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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