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Electromagnetic simulations and bio\u2010heat modeling were performed with MRI RF body and head coils tuned to 64 MHz and 127 MHz and positioned at 9 different imaging landmarks covering an area from the head to the lower limbs.<\/jats:p><\/jats:sec>Results<\/jats:title>For all patients and at both 1.5T and 3T, local transmit head coils produced negligible temperature rise (\n) for \n. For body imaging with quadrature\u2010driven coils at 1.5T, \n during a 10\u2010min scan remained\u2009<\u20093\u00b0C at all imaging landmarks for \n and <6\u00b0C for \n. For body imaging at 3T, \n during a 10\u2010min scan remained\u2009<\u20096\u00b0C at all imaging landmarks for \n. For shorter pulse sequences up to 2\u2009min, \n remained\u2009<\u20096\u00b0C for \n.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>For the models based on 6 patients studied, simulations suggest that MRI could be performed safely using a local head coil at both 1.5T and 3T, and with a body coil at 1.5T with pulses that produced \n. MRI at 3T could be performed safely in these patients using pulses with \n.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mrm.27350","type":"journal-article","created":{"date-parts":[[2018,6,12]],"date-time":"2018-06-12T13:12:58Z","timestamp":1528809178000},"page":"653-669","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["Changes in the specific absorption rate (SAR) of radiofrequency energy in patients with retained cardiac leads during MRI at 1.5T and 3T"],"prefix":"10.1002","volume":"81","author":[{"given":"Laleh","family":"Golestanirad","sequence":"first","affiliation":[{"name":"Athinoula A. 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