中国组织工程研究与临床康复2011，Vol.15Issue(9)：1627-1630,4.DOI:10.3969/j.issn.1673-8225.2011.09.026
基于直接数字合成技术用于心内膜三维标测的激励源设计
Excitation source design for endocardial three-dimensional mapping based on direct digital synthesis
摘要
Abstract
BACKGROUND: The excitation source's design is precondition of detecting the catheter's position in endocardial three-dimensional (3D) mapping by low-frequency electric field.OBJECTIVE: To design an excitation source for endocardial 3D mapping with simple structure and high integration, furthermore,to test the performance of the excitation source through animal experiments.M ETHODS : Three channel different frequencies (28, 30, 32 kHz) sine voltage signals were generated based on the direct digital synthesis (DDS) technology and modularization design through three AD9851 chip controlled by single-chip microcomputer STC89C52. The excitation source's performance is analyzed by acquisition and processing the localization signal in animal right atrium.RESOULTS AND CONCLUSION: The animal experimental results show that three signals' current value can be stable at 1mA and the frequency errors are 0.054％, 0.097％, 0.056％, respectively, furthermore, voltage signals in three directions can be extracted from the mapping catheter's sampling data. The excitation source has little frequency error and higher constant-current performance, and therefore can satisfy the endocardial mapping requirements.关键词
心内膜三维标测/激励源/直接数字频率合成/AD9851芯片/恒流分类
医药卫生引用本文复制引用
陈中中,田国强,苏智剑,郑伟..基于直接数字合成技术用于心内膜三维标测的激励源设计[J].中国组织工程研究与临床康复,2011,15(9):1627-1630,4.基金项目
河南省教育厅自然科学基础研究计划项目(2007460021)"基于反求工程的曲面模型三维快速重构技术" （2007460021）
