A Novel Magnetic Tracking Approach for Intrabody Objects

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

23 Scopus Citations
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Author(s)

  • Min Wang
  • Qinyuan Shi
  • Shuang Song
  • Max Q.-H. Meng

Detail(s)

Original languageEnglish
Pages (from-to)4976-4984
Number of pages9
Journal / PublicationIEEE Sensors Journal
Volume20
Issue number9
Online published9 Jan 2020
Publication statusPublished - 1 May 2020
Externally publishedYes

Abstract

Magnetic-based localization technique has been widely studied to provide accurate position and orientation information of intra-body objects, such as capsule endoscopes. However, the magnetic field decays rapidly, which is inversely proportional to the cubic of the distance. As a result, the tracking range is limited. In this paper, a magnetic servo approach is proposed for intra-body objects that move in a large volume, such as the whole digestive tract. A static tracking system formed with 8 Hall sensors is linked with amovable platform with motors. The proposed method utilizes the static tracking system to provide a precise positioning result within a small tracking range. When the distance between the object and the static tracking system exceeds a certain threshold, static tracking system will be controlled by the motors to move automatically based on a magnetic servo method to ensure accurate tracking results in a large range. Experimental results show that the proposed servo tracking method can provide a high accuracy of positioning and orientation results within a large range that as good as stationary method in small range. Within the range of 600 mm x 500 mm, the average position error is 2.04 mm and orientation error is 2.45º. The proposed localization method would be beneficial to the clinical examination and navigation.

Research Area(s)

  • Magnetic tracking, magnetic servo, widen-scale localization, magnetic capsule endoscopes

Citation Format(s)

A Novel Magnetic Tracking Approach for Intrabody Objects. / Wang, Min; Shi, Qinyuan; Song, Shuang et al.
In: IEEE Sensors Journal, Vol. 20, No. 9, 01.05.2020, p. 4976-4984.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review