中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (43): 8093-8096.doi: 10.3969/j.issn.1673-8225.2011.43.028

• 数字化骨科 digital orthopedics • 上一篇    下一篇

标测导管定位信号处理及仿真分析中呼吸与心跳运动的干扰

刘延涛，苏智剑，陈中中，刘新旭   

  1. 郑州大学机械工程学院，河南省郑州市  450001
  • 收稿日期:2011-05-25 修回日期:2011-07-17 出版日期:2011-10-22 发布日期:2011-10-22
  • 作者简介:刘延涛★，男，1987年生，河南省汝州市人，汉族，郑州大学在读硕士，主要从事计算机辅助设计研究。 liuyantaoboy@163.com

Signal processing and simulation analysis of mapping catheter positioning signals in respiration and heartbeat interference

Liu Yan-tao, Su Zhi-jian, Chen Zhong-zhong, Liu Xin-xu   

  1. School of Mechanical Engineering, Zhengzhou University, Zhengzhou  450001, Henan Province, China
  • Received:2011-05-25 Revised:2011-07-17 Online:2011-10-22 Published:2011-10-22
  • About author:Liu Yan-tao★, Studying for master’s degree, School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, Henan Province, China liuyantaoboy@163.com

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被引次数

1

摘要：

背景：在采用电场定位原理的心内膜三维标测系统中，标测导管在胸腔内的位置信号受到呼吸与心跳运动的干扰，使其定位精度受到极大影响。
目的：找到在标测导管定位信号中人工加入和检出呼吸与心跳运动干扰项的仿真分析和信号处理方法。
方法：首先根据标测原理推导了包含呼吸与心跳运动干扰的定位信号数学模型，分析和确定了信号的调理、检波和提取方法；然后利用Matlab仿真软件进行信号处理过程的理论仿真计算，以验证数学模型的正确性；最后以满足手术过程中高速实时定位要求为前提，设计出与理论模型相对应的硬件电路，并用Multisim电路设计软件做仿真实验以验证所提方法在实际工作过程中实现的可行性。
结果与结论：仿真实验结果表明无论是数值模拟还是电路仿真都可以很好地仿真出包含呼吸与心跳运动干扰的导管定位信号，所给出的理论分析方法及实际电路系统都能将呼吸与心跳干扰项顺利提取出来。

关键词: 三维标测, 标测导管, 定位信号, 包络, 乘法器, 解调

Abstract:

BACKGROUND: In the three-dimensional (3D) endocardial mapping system with electric filed positioning principle, the respiration and heartbeat movements influence the positioning signals of mapping catheter in the chest, which greatly affect the positioning accuracy. 
OBJECTIVE: To find a simulation analysis and signal processing method of artificially adding and detecting the respiration and heartbeat interference terms.
METHODS: First, the positioning signals’ mathematical model was proposed according to the mapping principle to determine the signal conditioning, detection and extraction methods. Then, the signal processing was simulated and calculated by Matlab to check if the mathematical model was right. Finally, to meet the requirements of high-speed and real-time during the operation, we designed the corresponding hardware circuit to theoreti-cal model, and used Multisim (circuit design software) to simulate the hardware circuit to check the feasibility of implementing the proposed method in the actual work.
RESULTS AND CONCLUSION: It showed that either numerical simulation or circuit simulation could emulate catheter positioning signals with respiration and heartbeat interference, the theoretical analysis method and actual circuit system could extract the respira-tion and heartbeat interference terms successfully.

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