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Paper Abstract and Keywords
Presentation 2010-03-09 09:45
On the 3D Inverse Problem of ECG Electric Dipole Dynamics
Akira Ohashi, Masahiro Nakagawa (Nagaoka Univ. of Tech.) NLP2009-160
Abstract (in Japanese) (See Japanese page) 
(in English) As is well known, the electrocardiogram (ECG) is widely used for diagnosis of heart.
The objective of this research is to estimate the electric dipole dynamics by means of solving an inverse problem
about the electric source of heart.
The body surface potential generated from a supposed dipole was computed by Finite Element Method (FEM).
The location of dipole was estimated by Genetic Algorithm (GA),which to minimize the mean square error of measured potential and computed potential.
In addition, by using the Lyapunov analysis the coordinate of the dipole was confirmed to have chaos characteristics.
In this report, 3D mesh for the chest region was created to estimate the spatio-temporal patterns of dipole dynamics.
First, we apply proposed method to measured surface potential.
Second, we examine the chaos characteristics in estimated dipole by Lyapunov exponent analysis.
Keyword (in Japanese) (See Japanese page) 
(in English) ECG Inverse Problem / Finite Element Method / Lyapunov Exponent / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 458, NLP2009-160, pp. 15-20, March 2010.
Paper # NLP2009-160 
Date of Issue 2010-03-02 (NLP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NLP2009-160

Conference Information
Committee NLP  
Conference Date 2010-03-09 - 2010-03-10 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To NLP 
Conference Code 2010-03-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the 3D Inverse Problem of ECG Electric Dipole Dynamics 
Sub Title (in English)  
Keyword(1) ECG Inverse Problem  
Keyword(2) Finite Element Method  
Keyword(3) Lyapunov Exponent  
1st Author's Name Akira Ohashi  
1st Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
2nd Author's Name Masahiro Nakagawa  
2nd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
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Date Time 2010-03-09 09:45:00 
Presentation Time 25 
Registration for NLP 
Paper # IEICE-NLP2009-160 
Volume (vol) IEICE-109 
Number (no) no.458 
Page pp.15-20 
#Pages IEICE-6 
Date of Issue IEICE-NLP-2010-03-02 

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