{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T18:33:52Z","timestamp":1791916432458,"version":"4.3.4"},"reference-count":20,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,11,22]],"date-time":"2005-11-22T00:00:00Z","timestamp":1132617600000},"content-version":"vor","delay-in-days":4284,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetic Resonance Imaging"],"published-print":{"date-parts":[[1994,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Magnetic resonance (MR) procedures are contraindicated for patients with certain ferromagnetic biomedical implants, primarily owing to the risk of movement or dislodgment of the implants by the static magnetic field. An additional concern is the amount of artifact that the implant produces, which can affect image quality and interpretation of the examination. Therefore, an ex vivo assessment of ferromagnetism and artifact was conducted for 12 different occluders used to treat patients with patent ductus arteriosus, atrial septal defects, and ventricular septal defects, in a 1.5\u2010T MR system. Seven of the occluders, made of 304 stainless steel, were ferromagnetic and displayed deflection forces of 248\u2013299 dynes. Five of the implants, made of MP35n, were nonferromagnetic. Artifacts were variable and depended primarily on the type and amount of metal used to construct the implant. The authors conclude that patients with ferromagnetic cardiac occluders may undergo MR procedures approximately 6 weeks after placement of these devices, to allow tissue growth to provide additional retentive force. After this time, it is highly unlikely that the magnetic fields associated with a 1.5\u2010T MR system are capable of moving or dislodging any of these cardiac occluders.<\/jats:p>","DOI":"10.1002\/jmri.1880040220","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T03:21:18Z","timestamp":1173151278000},"page":"213-215","source":"Crossref","is-referenced-by-count":33,"title":["Ex vivo evaluation of ferromagnetism and artifacts of cardiac occluders exposed to a 1.5\u2010T MR system"],"prefix":"10.1002","volume":"4","author":[{"given":"Frank G.","family":"Shellock","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stacy M.","family":"Morisoli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,11,22]]},"reference":[{"key":"e_1_2_1_2_2","first-page":"243","article-title":"Biological effects and safety aspects of magnetic resonance imaging","volume":"5","author":"Shellock FG","year":"1989","journal-title":"Magn Reson Q"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.147.1.6828719"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.151.2.389"},{"key":"e_1_2_1_5_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":"1988","journal-title":"Radiology"},{"key":"e_1_2_1_6_2","first-page":"279","article-title":"Metallic otologic implants: in vitro assessment of ferromagnetism at 1.5 T","volume":"12","author":"Shellock FG","year":"1991","journal-title":"AJNR"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.151.4.811"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.180.2.2068325"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.189.2.8210394"},{"key":"e_1_2_1_10_2","first-page":"243","article-title":"Ex vivo evaluation of ferromagnetism and artifacts for implantable vascular access ports exposed to a 1.5\u2010T MR imager (abstr)","volume":"1","author":"Shellock FG","year":"1991","journal-title":"JMRI"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.166.3.3340759"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.154.3.3969474"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880020217"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.177.2.2217801"},{"key":"e_1_2_1_15_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_16_2","volume-title":"USCI Rashkind PDA occluder system information brochure","year":"1986"},{"key":"e_1_2_1_17_2","volume-title":"Information brochure. Non surgical closure of patent ductus arteriosus using the Bard PDA umbrella: a guide for parents and patients","year":"1991"},{"key":"e_1_2_1_18_2","first-page":"753","article-title":"Double\u2010umbrella closure of atrial defects: initial clinical applications","volume":"80","author":"Rome JJ","year":"1990","journal-title":"Circulation"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.75.3.583"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.75.3.593"},{"key":"e_1_2_1_21_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.179.2.2014301"}],"container-title":["Journal of Magnetic Resonance Imaging"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fjmri.1880040220","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/jmri.1880040220","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T17:44:19Z","timestamp":1698169459000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/jmri.1880040220"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1994,3]]},"references-count":20,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1994,3]]}},"alternative-id":["10.1002\/jmri.1880040220"],"URL":"https:\/\/doi.org\/10.1002\/jmri.1880040220","archive":["Portico"],"relation":{},"ISSN":["1053-1807","1522-2586"],"issn-type":[{"value":"1053-1807","type":"print"},{"value":"1522-2586","type":"electronic"}],"subject":[],"published":{"date-parts":[[1994,3]]}}}