An Efficient Approach to Estimate MRI RF Field Induced In Vivo Heating for Small Medical Implants
An Efficient Approach to Estimate MRI RF Field Induced In Vivo Heating for Small Medical Implants
复制标题
一种有效的方法来估计小型医疗植入物体内引起的 MRI 射频场加热
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Ji Chen
中科院分区：
文献类型：
--
作者：
Dawei Li;Jianfeng Zheng;Yan Liu;Changwang Pan;W. Kainz;Fan Yang;Wen Wu;Ji Chen
本文提出了一种快速、有效的方法来估算磁共振成像过程中小型医用植入物的活体射频感应加热。对于任意形状的支架，提出了一种有效的方法来关联入射电场和诱导温升。以10厘米长的钛棒和6厘米长的肠道支架为例，在体外测试条件下验证了该方法的有效性。然后在解剖学校正的成年男性模型上进行活体体温升高估计。数值计算和实验研究证明了该方法的有效性和准确性。
In this paper, a quick and efficient approach is proposed to estimate in vivo RF-induced heating from small medical implants under MRI procedure. An efficient methodology is developed to correlate the incident electric field to the induced temperature rise for stents of arbitrary shapes. A 10-cm-long titanium rod and a 6-cm-long intestine stent are used as examples to validate the approach under in vitro testing conditions. In vivo temperature rise estimations are then performed on an anatomically corrected adult male model. Numerical and experimental studies demonstrate the efficiency and accuracy of the proposed method.