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Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage
PURPOSE: Stenosis of the superficial femoral artery (SFA) induces complex blood flow with increased velocities. Disease assessment is performed with Doppler ultrasound and digital subtraction angiography (DSA), but Doppler ultrasound is limited by angle dependency and DSA by ionizing radiation. An a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
© Georg Thieme Verlag KG
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6420338/ https://www.ncbi.nlm.nih.gov/pubmed/30886943 http://dx.doi.org/10.1055/a-0853-2002 |
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author | Hansen, Kristoffer Lindskov Hansen, Peter Møller Ewertsen, Caroline Lönn, Lars Jensen, Jørgen Arendt Nielsen, Michael Bachmann |
author_facet | Hansen, Kristoffer Lindskov Hansen, Peter Møller Ewertsen, Caroline Lönn, Lars Jensen, Jørgen Arendt Nielsen, Michael Bachmann |
author_sort | Hansen, Kristoffer Lindskov |
collection | PubMed |
description | PURPOSE: Stenosis of the superficial femoral artery (SFA) induces complex blood flow with increased velocities. Disease assessment is performed with Doppler ultrasound and digital subtraction angiography (DSA), but Doppler ultrasound is limited by angle dependency and DSA by ionizing radiation. An alternative is the vector flow imaging method based on transverse oscillation (TO), an angle-independent vector velocity technique using ultrasound. In this study, flow complexity and velocity measured with TO were compared with DSA for the assessment of stenosis in the SFA. MATERIALS AND METHODS: The vector concentration, a measure of flow complexity, and the velocity ratio obtained from the stenosis and a disease-free adjacent vessel segment, were estimated with TO in 11 patients with a total of 16 stenoses of the SFA. TO data were compared with the corresponding stenosis degree percentage obtained with DSA. RESULTS: The correlation between the vector concentration and DSA was very strong (R=0.93; p<0.001; 95% confidence interval (CI): 0.81–0.98), while only moderate for velocity ratio and DSA (R=0.50; p<0.07; 95% CI: 0.00–0.80). The correlation coefficients that were found were significantly different (p<0.005) without overlapping CI. CONCLUSION: The study indicated that flow changes in the SFA induced by stenosis can be quantified with TO, and that stenosis grading may be improved by estimation of flow complexity instead of velocity ratio. TO is a potential diagnostic tool for the assessment of atherosclerosis and peripheral arterial disease. |
format | Online Article Text |
id | pubmed-6420338 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | © Georg Thieme Verlag KG |
record_format | MEDLINE/PubMed |
spelling | pubmed-64203382019-03-18 Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage Hansen, Kristoffer Lindskov Hansen, Peter Møller Ewertsen, Caroline Lönn, Lars Jensen, Jørgen Arendt Nielsen, Michael Bachmann Ultrasound Int Open PURPOSE: Stenosis of the superficial femoral artery (SFA) induces complex blood flow with increased velocities. Disease assessment is performed with Doppler ultrasound and digital subtraction angiography (DSA), but Doppler ultrasound is limited by angle dependency and DSA by ionizing radiation. An alternative is the vector flow imaging method based on transverse oscillation (TO), an angle-independent vector velocity technique using ultrasound. In this study, flow complexity and velocity measured with TO were compared with DSA for the assessment of stenosis in the SFA. MATERIALS AND METHODS: The vector concentration, a measure of flow complexity, and the velocity ratio obtained from the stenosis and a disease-free adjacent vessel segment, were estimated with TO in 11 patients with a total of 16 stenoses of the SFA. TO data were compared with the corresponding stenosis degree percentage obtained with DSA. RESULTS: The correlation between the vector concentration and DSA was very strong (R=0.93; p<0.001; 95% confidence interval (CI): 0.81–0.98), while only moderate for velocity ratio and DSA (R=0.50; p<0.07; 95% CI: 0.00–0.80). The correlation coefficients that were found were significantly different (p<0.005) without overlapping CI. CONCLUSION: The study indicated that flow changes in the SFA induced by stenosis can be quantified with TO, and that stenosis grading may be improved by estimation of flow complexity instead of velocity ratio. TO is a potential diagnostic tool for the assessment of atherosclerosis and peripheral arterial disease. © Georg Thieme Verlag KG 2019-03 2019-03-15 /pmc/articles/PMC6420338/ /pubmed/30886943 http://dx.doi.org/10.1055/a-0853-2002 Text en https://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited. |
spellingShingle | Hansen, Kristoffer Lindskov Hansen, Peter Møller Ewertsen, Caroline Lönn, Lars Jensen, Jørgen Arendt Nielsen, Michael Bachmann Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title | Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title_full | Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title_fullStr | Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title_full_unstemmed | Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title_short | Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage |
title_sort | vector flow imaging compared with digital subtraction angiography for stenosis assessment in the superficial femoral artery – a study of vector concentration, velocity ratio and stenosis degree percentage |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6420338/ https://www.ncbi.nlm.nih.gov/pubmed/30886943 http://dx.doi.org/10.1055/a-0853-2002 |
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