In vitro evaluation of stent patency and in-stent stenoses in 10 metallic stents using MR angiography

The British Journal of Radiology
Okka W HamerNiels Zorger

Abstract

In vitro study to investigate the suitability of contrast enhanced magnetic resonance angiography (CEMRA) for determination of stent patency and grading of in-stent stenoses in 10 metallic stents. The Acculink carotid, DynaLink, Easy Wallstent, JostentSelfX XF, Luminexx, Omnilink, sinus-SuperFlex, SMART, Symphony and ZA stent were separately placed in a vascular phantom. Dedicated stenoses inside the stents generated a concentric lumen narrowing of 50%. CEMRA was performed for each stent. Signal loss inside the stents and artificial lumen narrowing were assessed objectively using the evaluation software of the MR imager. Moreover, three blinded observers determined visibility of stent patency and in-stent stenoses subjectively on a 3-point scale and graded in-stent stenoses. Loss of signal intensity within the stent lumen ranged between 90% (Wallstent) and 5% (ZA), artificial lumen narrowing between 56% (Symphony) and 22% (ZA). For the Symphony and Wallstent, visibility of patency and in-stent stenoses was impaired and the observers' grading exaggerated the degree of stenoses (by 23% and 33%, respectively). For the remainder of stents, patency and stenoses were visible and stenoses were graded accurately (less than 10% discrepa...Continue Reading

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Citations

Jul 20, 2011·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Wai-Kit LeeOliver F Hennessy
Mar 2, 2011·The International Journal of Cardiovascular Imaging·Maythem SaeedMark Wilson
May 10, 2007·Magma·Olaf Saborowski, Maythem Saeed
Nov 18, 2011·Radiology Research and Practice·Michael KöhlerDavid Maintz
May 16, 2014·Der Radiologe·F PoschenriederO W Hamer
May 16, 2020·Cardiovascular and Interventional Radiology·Evelien E de VriesGert J de Borst

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