通过单个感应线圈对头部血肿的时间体积变化进行非接触式监测：一项数值研究。
Non-Contact Monitoring of Temporal Volume Changes of a Hematoma in the Head by a Single Inductive Coil: A Numerical Study.
出版信息
IEEE Trans Biomed Eng. 2019 May;66(5):1328-1336. doi: 10.1109/TBME.2018.2872851. Epub 2018 Oct 1.
OBJECTIVE
This numerical study was designed to evaluate the feasibility of using an inductive coil for monitoring the changes in the volume of a hematoma in the head in situ and to compare the inductive coil performance to that of a spiral antenna based on the radar principle.
METHODS
Numerical analysis was used to solve the complete set of Maxwell's equations in full three-dimensional anatomical model of a head and brain with data on clinical occurrence of hematomas from the clinical literature, for frequencies of 100 MHz, 500 MHz, and 1 GHz.
RESULTS
- The analysis shows that the spiral radar antenna provides a better resolution when the antenna can be placed exactly facing the center of the volume of blood. Under any other circumstance, the inductive coil has a better resolution at both 500 MHz and 1 GHz. 2) The induction coil is more sensitive to rotation artifacts than the spiral antenna. 3) Single frequency measurements do not provide conclusive results.
CONCLUSION
The inductive coil has the ability to monitor small changes in the volume of a hematoma in the head. However, multifrequency measurements are required for correct diagnostic.
SIGNIFICANCE
This study provides a new, low-cost alternative to the conventional medical imaging for monitoring the hematoma increase.
目的
本数值研究旨在评估使用感应线圈原位监测头部血肿体积变化的可行性，并基于雷达原理比较感应线圈和螺旋天线的性能。
方法
使用数值分析方法求解头部和大脑全三维解剖模型的麦克斯韦方程组的完整集合，使用来自临床文献中血肿发生的数据，频率为 100 MHz、500 MHz 和 1 GHz。
结果
1）分析表明，当天线可以精确地放置在血肿体积的中心时，螺旋雷达天线提供了更好的分辨率。在任何其他情况下，感应线圈在 500 MHz 和 1 GHz 时都具有更好的分辨率。2）感应线圈比螺旋天线对旋转伪影更敏感。3）单频测量不能提供明确的结果。
结论
感应线圈具有监测头部血肿体积小变化的能力。但是，需要进行多频测量才能进行正确的诊断。
意义
本研究为监测血肿增加提供了一种新的、低成本的替代传统医学成像的方法。
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