| MR imaging artifacts, ferromagnetism, and magnetic torque of intravascular filters, stents, and coils. | |
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MedLine Citation:
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PMID: 3340759 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Experiments were conducted in which various intravascular filters, stents, and coils were imaged using magnetic resonance (MR) spin-echo technique at 0.35 T. These devices were also evaluated for ferromagnetism (at 0.35, 1.5, and 4.7 T), magnetic torque (at 0.35 and 1.5 T), and magnetically induced migration within a plastic tube (at 0.35 and 1.5 T for the Greenfield filter [GF]). The stainless-steel GF was evaluated in vitro for its propensity to perforate canine inferior venae cavae (IVC). Magnetic force and torque at 1.5 T did not dislodge the GF or result in perforation of canine IVC by the GF. Beta-3 titanium alloy (used in a new percutaneous version of the GF) is apparently one of the best-suited metals for use with MR imaging because of its lack of ferromagnetism (up to 4.7 T) and absence of MR imaging artifacts (at 0.35 T). Devices composed of Elgiloy (Mobin-Uddin filter), nitinol, and MP32-N (Amplatz filter) alloys all created mild artifacts. Devices fashioned from 304 and 316L (GF and Palmaz stent) stainless-steel alloys created severe "black-hole" artifacts, with the 304 alloy devices also showing marked image distortion. Generally, the greater the ferromagnetism of a device, the greater its magnetic susceptibility artifact. |
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Authors:
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G P Teitelbaum; W G Bradley; B D Klein |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Radiology Volume: 166 ISSN: 0033-8419 ISO Abbreviation: Radiology Publication Date: 1988 Mar |
Date Detail:
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Created Date: 1988-03-16 Completed Date: 1988-03-16 Revised Date: 2001-03-23 |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 657-64 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, Thomas Jefferson University, Philadelphia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Filtration
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instrumentation Magnetic Resonance Imaging* Magnetics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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