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In this study the helical stent is evaluated of the radio frequency (RF)-induced heating for the variation of gap and pitch under 1.5 T and 3 T magnetic resonance imaging (MRI). It is shown that the gap increment can reduce the peak 1 g averaged SAR and the pitch variation can also alter the heating. The detailed discussions are presented.
In this work, the magnetic resonance imaging (MRI) radio frequency (RF)-induced heating mechanism for an esophageal stent is discussed from the prospective of forward scattering and the reciprocity theorem. We conclude that the RF-induced heating largely depends on the induced currents on the surface of the stent. Based on this understanding, a novel implantable segmented stent structure is developed...
In this work, a novel implantable medical stent is designed to reduce the radio frequency (RF)-induced heating from implantable medical stent under magnetic resonance imaging (MRI) procedure. By using segmented structure, the induced specific absorption rate (SAR) for a 100 mm length stent is reduced from 54.4 mW/g to 13.4 mW/g. Numerical simulation demonstrates the effectiveness of the designed structure.
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