On the use of particle filters for electromagnetic tracking in high dose rate brachytherapy

Goetz TI, Lahmer G, Brandt T, Kallis K, Strnad V, Bert C, Hensel B, Tome AM, Lang EW (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physics in Medicine and Biology IOP Publishing

Book Volume: 62

Pages Range: 7617-7640

Journal Issue: 19

DOI: 10.1088/1361-6560/aa8591

Abstract

Modern radiotherapy of female breast cancers often employs high dose rate brachytherapy, where a radioactive source is moved inside catheters, implanted in the female breast, according to a prescribed treatment plan. Source localization relative to the patient's anatomy is determined with solenoid sensors whose spatial positions are measured with an electromagnetic tracking system. Precise sensor dwell position determination is of utmost importance to assure irradiation of the cancerous tissue according to the treatment plan. We present a hybrid data analysis system which combines multi-dimensional scaling with particle filters to precisely determine sensor dwell positions in the catheters during subsequent radiation treatment sessions. Both techniques are complemented with empirical mode decomposition for the removal of superimposed breathing artifacts. We show that the hybrid model robustly and reliably determines the spatial positions of all catheters used during the treatment and precisely determines any deviations of actual sensor dwell positions from the treatment plan. The hybrid system only relies on sensor positions measured with an EMT system and relates them to the spatial positions of the implanted catheters as initially determined with a computed x-ray tomography.

Authors with CRIS profile

Godehard Lahmer Department of Radiation Oncology Tobias Brandt Department of Radiation Oncology Karoline Kallis Department of Radiation Oncology Christoph Bert Professur für Med. Strahlenphysik Bernhard Hensel Max Schaldach-Stiftungsprofessur für Biomedizinische Technik

Additional Organisation(s)

Zentrum für Medizinische Physik und Technik

Involved external institutions

Universität Regensburg DE Germany (DE) University of Aveiro / Universidade de Aveiro PT Portugal (PT)

How to cite

APA:

Goetz, T.I., Lahmer, G., Brandt, T., Kallis, K., Strnad, V., Bert, C.,... Lang, E.W. (2017). On the use of particle filters for electromagnetic tracking in high dose rate brachytherapy. Physics in Medicine and Biology, 62(19), 7617-7640. https://dx.doi.org/10.1088/1361-6560/aa8591

MLA:

Goetz, Th I., et al. "On the use of particle filters for electromagnetic tracking in high dose rate brachytherapy." Physics in Medicine and Biology 62.19 (2017): 7617-7640.

BibTeX: Download