Real-Time Tumor Tracking for Four-Dimensional Computed Tomography Using SQUID Magnetometers

Author

McGary, John E.

Author_Institution

Baylor Coll. of Med., Houston, TX, USA

Volume

45

Issue

9

fYear

2009

Firstpage

3351

Lastpage

3361

Abstract

We present a method for real-time tumor tracking in external beam radiotherapy using superconducting quantum interference device (SQUID) magnetometers. The objective is to develop a localization algorithm and determine a cost effective sensor configuration that is capable of long-range localization, ~1000 mm, with an accuracy of 1-2 mm. We developed several algorithms to calculate the location of a magnetic dipole for geometry relevant for four-dimensional computed tomography (4DCT) to investigate sensor configuration and accuracy. We determined that two cube detectors, located diametrically opposite, are a feasible design for the localization system.

Keywords

SQUID magnetometers; biomagnetism; computerised tomography; magnetic sensors; radiation therapy; tumours; 4D computed tomography; SQUID magnetometer; cost effective sensor configuration; cube detectors; external beam radiotherapy; localization algorithm; long-range localization; magnetic dipole; real-time tumor tracking; superconducting quantum interference device; Image-guided therapy; localization; magnetic dipole; magnetic tracking;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2020430

Filename

5208490