磁探测电阻抗成像呼吸监测仿真研究

发布时间：2018-01-03 22:30

本文关键词：磁探测电阻抗成像呼吸监测仿真研究　出处：《生物医学工程学杂志》2017年01期 　论文类型：期刊论文

【摘要】：为了探索磁探测电阻抗成像应用于肺部呼吸监测中的可行性,针对新型磁探测电阻抗成像技术的正问题,以真实人体肺部数据构建成像体物理模型,采用了有限元方法得到成像体内部的电势和电流密度分布,然后根据毕奥-萨伐尔定律分别获得呼气末与吸气末成像体外部的磁感应强度仿真数据。结果表明,吸气末时成像体周围的磁感应强度值比呼气末小8.875%。研究结果显示了呼吸时由于肺容积、电导率的不同而导致周围磁感应强度的差异等信息,为后续磁探测电阻抗成像的图像重建以及临床疾病检测奠定了基础。
[Abstract]:In order to explore the feasibility of magnetic detection electrical impedance imaging (MRI) applied in pulmonary respiratory monitoring, a physical model of imaging volume is constructed based on real human lung data, aiming at the positive problems of new MRI technology. The distribution of electric potential and current density inside the imaging body was obtained by using finite element method, and then the magnetic induction intensity simulation data of the end expiratory and inspiratory end imaging body were obtained according to the law of Beo-Savart. The results show that the magnetic induction intensity of the imaging body at the end of breath is simulated. The magnetic induction intensity around the imaging body at the end of inspiratory period is 8.875 5 less than that at the end of breath. The results show that the difference of magnetic induction intensity during breathing is due to the difference of lung volume and electrical conductivity. It lays a foundation for image reconstruction and clinical disease detection of magnetic detection electrical impedance imaging.
【作者单位】：天津工业大学天津市光电检测技术与系统重点实验室;
【基金】：天津市自然科学基金资助项目(14JCYBJC42300)
【分类号】：R443.6;TP391.41
【正文快照】： 引言随着科技的进步与发展,电磁场技术在生物医学研究中得到了广泛应用,例如对电磁仿生防护神经网络的研究[1]、电磁辐射在物理人建模中的应用[2]、颅内电磁应力分析等[3]。尤其是电子计算机断层扫描(computed tomography,CT)、核磁共振、超声以及核医学等医学成像技术已成为

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