| Carbon fibre and nitinol needles for MRI-guided interventions: first in vitro and in vivo application. | |
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MedLine Citation:
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PMID: 20688445 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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OBJECTIVE: To assess the artefact properties of a MR-compatible carbon fibre needle with a nitinol mandrin in vitro and to report first clinical experiences. MATERIALS AND METHODS: In vitro, the carbon fibre/nitinol needle was imaged at different angles against the main magnetic field (1.5T open bore magnet). A gradient echo MR fluoroscopy sequence (GRE: TR 9.3 ms, TE 3.12 ms, bandwidth 200 Hz/pixel, flip-angle 12°) and a fast turbo spin echo sequence (FSE: TR 412 ms, TE 9.7 ms, bandwidth 200 Hz/pixel, flip-angle 150°) were used. Artefact width, needle intensity contrast and needle tip location errors were assessed. In vivo, lumbar periradicular corticosteroid injections and one sclerotherapy were performed with carbon fibre needles (10 procedures) and with titanium alloy needles (2 procedures). The artefact sizes and contrasts were measured. RESULTS: In vitro, artefact diameters of the carbon fibre needle ranged from 3.3 to 4.6 mm, contrasts from 0.11 to 0.52, with larger artefact contrasts and widths with the GRE sequence. Needle tip location errors of -2.1 to -2.8 mm were observed. Decreasing angles to the main field lead to smaller artefacts. In vivo, the carbon fibre/nitinol needle produced smaller artefacts (mean width FSE/GRE: 2.8mm/4.6mm) with lower contrast (0.30-0.42) than the titanium alloy needle (mean width FSE/GRE: 4.1 mm/7.5 mm, contrast 0.60-0.73). CONCLUSIONS: The carbon fibre/nitinol needle is useful for performing MR-guided interventions at 1.5T, producing more subtle artefacts than a titanium alloy needle, but with an incomplete depiction and thus inaccurate localization of the needle tip. |
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Authors:
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Christoph Thomas; Hanne Wojtczyk; Hansjörg Rempp; Stephan Clasen; Marius Horger; Christoph von Lassberg; Jan Fritz; Claus D Claussen; Philippe L Pereira |
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Publication Detail:
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Type: Journal Article Date: 2010-08-04 |
Journal Detail:
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Title: European journal of radiology Volume: 79 ISSN: 1872-7727 ISO Abbreviation: Eur J Radiol Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-08-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8106411 Medline TA: Eur J Radiol Country: Ireland |
Other Details:
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Languages: eng Pagination: 353-8 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany. Christoph.thomas@med.uni-tuebingen.de |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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