{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,23]],"date-time":"2025-10-23T20:47:06Z","timestamp":1761252426903},"reference-count":36,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,7,18]],"date-time":"2005-07-18T00:00:00Z","timestamp":1121644800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetic Resonance Imaging"],"published-print":{"date-parts":[[2005,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To evaluate different grades of in\u2010stent stenosis in a nickel\u2010titanium stent with MRI.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Magnetic resonance phase velocity mapping (MR\u2010PVM) was used to measure flow velocity through a 9\u2010mm NiTi stent with three different degrees of stenosis in a phantom study. The tested stenotic geometries were 1) axisymmetric 75%, 2) axisymmetric 90%, and 3) asymmetric 50%. The MR\u2010PVM data were subsequently compared with the velocities from computational fluid dynamic (CFD) simulations of identical conditions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Good quantitative agreement in velocity distribution for the 50% and 75% stenoses was observed. The agreement was poor for the 90% stenosis, most likely due to turbulence and the high\u2010velocity gradients found in the small luminal area relative to the pixel resolution in our imaging settings.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The accuracy of the MRI velocities inside the stented area renders MRI a modality that may be used to assess moderate to severe in\u2010stent restenosis (ISR) in medium\u2010sized vascular stents in peripheral vessels, such as the iliac, carotid, and femoral arteries. Advances in MR instrumentation may provide sufficient resolution to obtain adequate velocity information from smaller vessels, such as the coronary arteries, and allow MRI to substitute for invasive and expensive catheterization procedures currently in clinical use. J. Magn. Reson. Imaging 2005;22:248\u2013257. \u00a9 2005 Wiley\u2010Liss, Inc.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jmri.20380","type":"journal-article","created":{"date-parts":[[2005,7,18]],"date-time":"2005-07-18T19:48:49Z","timestamp":1121716129000},"page":"248-257","source":"Crossref","is-referenced-by-count":11,"title":["Evaluation of in\u2010stent stenosis by magnetic resonance phase\u2010velocity mapping in nickel\u2010titanium stents"],"prefix":"10.1002","volume":"22","author":[{"given":"Andrea D.","family":"Holton","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edward G.","family":"Walsh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brigitta C.","family":"Brott","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ramakrishna","family":"Venugopalan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bradley","family":"Hershey","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasushi","family":"Ito","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alan","family":"Shih","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roy","family":"Koomullil","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas S.","family":"Anayiotos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,7,18]]},"reference":[{"key":"e_1_2_5_2_2","first-page":"296","article-title":"Update on in\u2010stent restenosis","volume":"3","author":"El\u2010Omar MM","year":"2001","journal-title":"Curr Intervent Cardiol Rep"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.100.17.1777"},{"key":"e_1_2_5_4_2","first-page":"431","volume-title":"The new manual of interventional cardiology","author":"Moscucci M","year":"1996"},{"key":"e_1_2_5_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/00006123-200209000-00007"},{"key":"e_1_2_5_6_2","doi-asserted-by":"publisher","DOI":"10.1053\/ejvs.2002.1974"},{"key":"e_1_2_5_7_2","first-page":"204","volume-title":"Textbook of medicine","author":"Faxon DP","year":"2000"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/ccd.1303"},{"key":"e_1_2_5_9_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.92.8.2333"},{"key":"e_1_2_5_10_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.0000015852.60212.DB"},{"key":"e_1_2_5_11_2","doi-asserted-by":"publisher","DOI":"10.1161\/hc4401.098472"},{"key":"e_1_2_5_12_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.0000060542.79482.81"},{"key":"e_1_2_5_13_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.100.18.1872"},{"key":"e_1_2_5_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.20238"},{"key":"e_1_2_5_15_2","first-page":"375","volume-title":"Magnetic resonance imaging\u2014physical principles and sequence design","author":"Haacke EM","year":"1999"},{"key":"e_1_2_5_16_2","unstructured":"BehrensGR AgarwalRK.Numerical simulation of steady Newtonian and non\u2010 Newtonian flow through a vascular stenosis. 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