Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm

Xiaoqi He,1 Zizhao Zheng,1,2 Chao Hu1 1Ningbo Institute of Technology, Zhejiang University, Ningbo, People's Republic of China; 2Taiyuan University of Science and Technology, Taiyuan, People's Republic of China Abstract: The development of the capsule endoscope has made possible th...

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Autores principales:	He XQ, Zheng ZZ, Hu C
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/feb8e34b833a4d5480c7b9ad370d4785
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spelling	oai:doaj.org-article:feb8e34b833a4d5480c7b9ad370d47852021-12-02T02:51:36ZMagnetic localization and orientation of the capsule endoscope based on a random complex algorithm1179-1470https://doaj.org/article/feb8e34b833a4d5480c7b9ad370d47852015-04-01T00:00:00Zhttp://www.dovepress.com/magnetic-localization-and-orientation-of-the-capsule-endoscope-based-o-peer-reviewed-article-MDERhttps://doaj.org/toc/1179-1470 Xiaoqi He,1 Zizhao Zheng,1,2 Chao Hu1 1Ningbo Institute of Technology, Zhejiang University, Ningbo, People's Republic of China; 2Taiyuan University of Science and Technology, Taiyuan, People's Republic of China Abstract: The development of the capsule endoscope has made possible the examination of the whole gastrointestinal tract without much pain. However, there are still some important problems to be solved, among which, one important problem is the localization of the capsule. Currently, magnetic positioning technology is a suitable method for capsule localization, and this depends on a reliable system and algorithm. In this paper, based on the magnetic dipole model as well as magnetic sensor array, we propose nonlinear optimization algorithms using a random complex algorithm, applied to the optimization calculation for the nonlinear function of the dipole, to determine the three-dimensional position parameters and two-dimensional direction parameters. The stability and the antinoise ability of the algorithm is compared with the Levenberg–Marquart algorithm. The simulation and experiment results show that in terms of the error level of the initial guess of magnet location, the random complex algorithm is more accurate, more stable, and has a higher “denoise” capacity, with a larger range for initial guess values. Keywords: wireless capsule endoscope, magnet, optimization He XQZheng ZZHu CDove Medical PressarticleMedical technologyR855-855.5ENMedical Devices: Evidence and Research, Vol 2015, Iss default, Pp 175-184 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medical technology R855-855.5
spellingShingle	Medical technology R855-855.5 He XQ Zheng ZZ Hu C Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
description	Xiaoqi He,1 Zizhao Zheng,1,2 Chao Hu1 1Ningbo Institute of Technology, Zhejiang University, Ningbo, People's Republic of China; 2Taiyuan University of Science and Technology, Taiyuan, People's Republic of China Abstract: The development of the capsule endoscope has made possible the examination of the whole gastrointestinal tract without much pain. However, there are still some important problems to be solved, among which, one important problem is the localization of the capsule. Currently, magnetic positioning technology is a suitable method for capsule localization, and this depends on a reliable system and algorithm. In this paper, based on the magnetic dipole model as well as magnetic sensor array, we propose nonlinear optimization algorithms using a random complex algorithm, applied to the optimization calculation for the nonlinear function of the dipole, to determine the three-dimensional position parameters and two-dimensional direction parameters. The stability and the antinoise ability of the algorithm is compared with the Levenberg–Marquart algorithm. The simulation and experiment results show that in terms of the error level of the initial guess of magnet location, the random complex algorithm is more accurate, more stable, and has a higher “denoise” capacity, with a larger range for initial guess values. Keywords: wireless capsule endoscope, magnet, optimization
format	article
author	He XQ Zheng ZZ Hu C
author_facet	He XQ Zheng ZZ Hu C
author_sort	He XQ
title	Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
title_short	Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
title_full	Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
title_fullStr	Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
title_full_unstemmed	Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
title_sort	magnetic localization and orientation of the capsule endoscope based on a random complex algorithm
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/feb8e34b833a4d5480c7b9ad370d4785
work_keys_str_mv	AT hexq magneticlocalizationandorientationofthecapsuleendoscopebasedonarandomcomplexalgorithm AT zhengzz magneticlocalizationandorientationofthecapsuleendoscopebasedonarandomcomplexalgorithm AT huc magneticlocalizationandorientationofthecapsuleendoscopebasedonarandomcomplexalgorithm
_version_	1718402140839346176

Magnetic localization and orientation of the capsule endoscope based on a random complex algorithm

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