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CT angiography of various superficial femoral artery stents: An in vitro phantom study.
MedLine Citation:
PMID:  21546182     Owner:  NLM     Status:  Publisher    
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.
Michael Kaempf; Dominik Ketelsen; Roland Syha; Sebastian Sixt; Stefanie Mangold; Christoph Thomas; Claus D Claussen; Martin Heuschmid; Klaus Brechtel
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-4
Journal Detail:
Title:  European journal of radiology     Volume:  -     ISSN:  1872-7727     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8106411     Medline TA:  Eur J Radiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ireland Ltd.
Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany.
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