| CT angiography of various superficial femoral artery stents: An in vitro phantom study. | |
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MedLine Citation:
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PMID: 21546182 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: To evaluate CT reconstruction parameters to improve stent lumen visualization in vitro. MATERIAL AND METHODS: 12 latest superficial femoral artery (SFA) stents were placed in a vessel phantom (diameter 4.7mm, intravascular attenuation 250HU, extravascular density 50HU). Stents were imaged with a 128-slice scanner (SOMATOM Definition Flash, Siemens, Germany) with standard parameters: 120kV, 200mAs, collimation 128mm×0.6mm. Different reconstruction parameters were evaluated: B26f, B30f, B45f, B46f and B60f kernel; slice thickness of 0.6, 2.0 and 5.0mm. To measure visualization characteristics, stent lumen diameter and intraluminal attenuation were assessed. RESULTS: Best stent lumen visualization could be obtained using the B46f kernel (p<0.001). The visible stent lumen ranged from 66.4% to 83.3% with a mean diameter of 77.7±4.6%. Nitinol stents showed a significant improved lumen visibility compared to the cobalt-chromium stent (p=0.02). The most realistic lumen attenuation was achieved using the B46f kernel with a mean attenuation of 259.3±8.9HU. The visible lumen diameter in protocols with 5mm slice thickness was significantly lower (70.0±4.9%) compared to thinner slices (p<0.001). CONCLUSION: CTA of SFA stents should be reconstructed with a slice thickness of 2.0mm and a B46f kernel to achieve best image quality and to become more sensitive to exclude instent restenosis. |
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Authors:
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Michael Kaempf; Dominik Ketelsen; Roland Syha; Sebastian Sixt; Stefanie Mangold; Christoph Thomas; Claus D Claussen; Martin Heuschmid; Klaus Brechtel |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-4 |
Journal Detail:
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Title: European journal of radiology Volume: - ISSN: 1872-7727 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-6 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8106411 Medline TA: Eur J Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Ireland Ltd. |
Affiliation:
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Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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