Self-Correcting Magnetic Tracking in Dynamic Medical Environments

Author

Zubiao Xiong ; McGary, John E. ; Ji Chen

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Houston, Houston, TX, USA

Volume

51

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

1

Lastpage

9

Abstract

We propose a novel self-correcting tracking technique that can minimize the dynamic distortion during magnetic tracking. In our method, the magnetic field distortion is estimated through field expansion and then minimized in an iterative tracking procedure. Sparse sensor arrays are designed to measure the spatial gradient tensors of the magnetic field for our method. Numerical results demonstrate that the tracking error caused by field distortion could be reduced from several tens of millimeters to below 2 mm.

Keywords

biomedical equipment; magnetic sensors; radiation therapy; tumours; dynamic distortion; dynamic medical environments; field expansion; iterative tracking procedure; magnetic field distortion; self-correcting magnetic tracking technique; sparse sensor arrays; spatial gradient tensors; Approximation methods; Distortion measurement; Magnetic moments; Sensor arrays; Tensile stress; Tracking; Transmitters; Computer-aided radiotherapy; magnetic field distortion; magnetic tracking; tumor motion;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2345333

Filename

6870481