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The native T<jats:sub>1<\/jats:sub> values were compared between AMI and CMI models (independent sample <jats:italic>t<\/jats:italic>\u2010test). The intraclass correlation coefficient was used to assess inter\u2010 and intraobserver variability.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Measured infarct sizes did not differ between native T<jats:sub>1<\/jats:sub> mapping and LGE images (AMI: <jats:italic>P<\/jats:italic>\u2009=\u20090.913; CMI: <jats:italic>P<\/jats:italic>\u2009=\u20090.233), and good agreement was observed between the two techniques (AMI: bias, \u20133.38\u2009\u00b1\u200919.38%; R<jats:sup>2<\/jats:sup>\u2009=\u20090.96; CMI: bias, \u201310.55\u2009\u00b1\u200910.90%; R<jats:sup>2<\/jats:sup>\u2009=\u20090.90). However, the native infarction myocardium T<jats:sub>1<\/jats:sub> values and the T<jats:sub>1<\/jats:sub> signal intensity ratio of infarct and remote myocardium (T<jats:sub>1<\/jats:sub> SI ratio) did not differ significantly between AMI and CMI (<jats:italic>P<\/jats:italic>\u2009=\u20090.173).<\/jats:p><\/jats:sec><jats:sec><jats:title>Data Conclusion<\/jats:title><jats:p>Noncontrast native T<jats:sub>1<\/jats:sub> mapping can accurately determine acute and chronic infarct areas as well as conventional LGE imaging; however, it cannot distinguish acute from chronic MI.<\/jats:p><jats:p><jats:bold>Level of Evidence:<\/jats:bold> 1<\/jats:p><jats:p><jats:bold>Technical Efficacy:<\/jats:bold> Stage 2<\/jats:p><jats:p>J. Magn. Reson. Imaging 2018;47:1406\u20131414.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jmri.25871","type":"journal-article","created":{"date-parts":[[2017,10,16]],"date-time":"2017-10-16T20:02:58Z","timestamp":1508184178000},"page":"1406-1414","source":"Crossref","is-referenced-by-count":13,"title":["Native T<sub>1<\/sub> mapping for characterization of acute and chronic myocardial infarction in swine: Comparison with contrast\u2010enhanced MRI"],"prefix":"10.1002","volume":"47","author":[{"given":"Xi","family":"Liu","sequence":"first","affiliation":[{"name":"Department of Radiology Key Laboratory of Obstetric &amp; Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University Chengdu Sichuan P.R. China"},{"name":"Department of Radiology West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiang\u2010long","family":"Hou","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Surgery West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi\u2010gang","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Radiology West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chun\u2010chao","family":"Xia","sequence":"additional","affiliation":[{"name":"Department of Radiology West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lin\u2010jun","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Radiology Key Laboratory of Obstetric &amp; Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peng\u2010fei","family":"Ye","sequence":"additional","affiliation":[{"name":"Department of Radiology Key Laboratory of Obstetric &amp; Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wan\u2010lin","family":"Peng","sequence":"additional","affiliation":[{"name":"Department of Radiology West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lei","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Radiology West China Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meng\u2010xi","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Radiology Key Laboratory of Obstetric &amp; Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University Chengdu Sichuan P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ying\u2010kun","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Radiology Key Laboratory of Obstetric &amp; Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University Chengdu Sichuan P.R. 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