The induced radiofrequency (RF) electrical field resulting in unwanted heating in patients with and without implants during magnetic resonance imaging (MRI) is a complex function of multiple factors which must be considered in patient risk assessment, including patient anatomy, imaging positions, RF characteristics of the implant, implant location, and MRI scanner design and scan configuration. In this paper, the dependence of the induced fields upon the birdcage design is investigated to determine the minimal range of RF body coils necessary to guarantee a comprehensive risk evaluation regarding heating and electromagnetic compatibility for any clinical MRI scanner.
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