{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:39:35Z","timestamp":1760027975984},"reference-count":21,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2005,11,22]],"date-time":"2005-11-22T00:00:00Z","timestamp":1132617600000},"content-version":"vor","delay-in-days":4100,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetic Resonance Imaging"],"published-print":{"date-parts":[[1994,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Ex vivo testing techniques were used to determine the ferromagnetic qualities of, presence of heating in, and artifacts produced by 13 different heart valve prostheses exposed to a 1.5\u2010T (64\u2010MHz) magnetic resonance (MR) system. None of the heart valve prostheses showed a measurable deflection in the 1.5\u2010T static magnetic field. Only minimal artifacts were produced during MR imaging with a fast spoiled GRASS (gradient\u2010recalled acquisition in the steady state) pulse sequence. The largest temperature changes measured during a \u201cworst case\u201d MR imaging sequence (estimated average specific absorption rate, 2.5 W\/kg; estimated spatial peak specific absorption rate, 7.6 W\/kg) were +0.2\u00b0C with the implant imaged \u201cin air\u201d and +0.3\u00b0C with the implant imaged in normal saline. Therefore, MR procedures performed with a 1.5\u2010T (64\u2010MHz) MR system may be performed safely in patients with any of the 13 different heart valve prostheses evaluated in this study.<\/jats:p>","DOI":"10.1002\/jmri.1880040521","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T03:14:29Z","timestamp":1173150869000},"page":"756-758","source":"Crossref","is-referenced-by-count":47,"title":["Ex vivo evaluation of ferromagnetism, heating, and artifacts produced by heart valve prostheses exposed to a 1.5\u2010T MR system"],"prefix":"10.1002","volume":"4","author":[{"given":"Frank G.","family":"Shellock","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stacy M.","family":"Morisoli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,11,22]]},"reference":[{"key":"e_1_2_1_2_2","volume-title":"Magnetic resonance: bioeffects, safety, and patient management","author":"Shellock FG","year":"1994"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.176.3.2202008"},{"key":"e_1_2_1_4_2","volume-title":"Cardiovascular applications of magnetic resonance","author":"Shellock FG","year":"1993"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.151.2.389"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.151.4.811"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.189.2.8210394"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880040220"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880010114"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.180.2.2068325"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.137.4.857"},{"key":"e_1_2_1_12_2","first-page":"150","article-title":"High\u2010field\u2010strength MR imaging and metallic bioimplants: an in vitro evaluation of deflection forces and temperature changes induced in large prostheses (abstr)","volume":"165","author":"Shellock FG","year":"1987","journal-title":"Radiology"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(88)90907-1"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00187551"},{"key":"e_1_2_1_15_2","first-page":"661","article-title":"Effects of magnetic fields used in MRI on 15 prosthetic heart valves","volume":"67","author":"Hassler M","year":"1986","journal-title":"J Radiol"},{"key":"e_1_2_1_16_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.154.3.3969474"},{"key":"e_1_2_1_17_2","first-page":"267","article-title":"Ferromagnetism and MR imaging: safety of carotid vascular clamps","volume":"11","author":"Teitelbaum GP","year":"1990","journal-title":"AJNR"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.166.3.3340759"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.179.2.2014301"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880020217"},{"key":"e_1_2_1_21_2","first-page":"41","article-title":"MR artifacts: a review","volume":"2","author":"Bellon EM","year":"1984","journal-title":"Magn Reson Imaging"},{"key":"e_1_2_1_22_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiographics.6.5.3685515"}],"container-title":["Journal of Magnetic Resonance Imaging"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fjmri.1880040521","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/jmri.1880040521","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T10:22:36Z","timestamp":1698229356000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/jmri.1880040521"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1994,9]]},"references-count":21,"journal-issue":{"issue":"5","published-print":{"date-parts":[[1994,9]]}},"alternative-id":["10.1002\/jmri.1880040521"],"URL":"https:\/\/doi.org\/10.1002\/jmri.1880040521","archive":["Portico"],"relation":{},"ISSN":["1053-1807","1522-2586"],"issn-type":[{"value":"1053-1807","type":"print"},{"value":"1522-2586","type":"electronic"}],"subject":[],"published":{"date-parts":[[1994,9]]}}}