A tool to automatically analyze electromagnetic tracking data from high dose rate brachytherapy of breast cancer patients

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

Publication Type: Journal article

Publication year: 2017

Journal

PLoS ONE Public Library of Science

Book Volume: 12

Journal Issue: 9

DOI: 10.1371/journal.pone.0183608

Abstract

During High Dose Rate Brachytherapy (HDR-BT) the spatial position of the radiation source inside catheters implanted into a female breast is determined via electromagnetic tracking (EMT). Dwell positions and dwell times of the radiation source are established, relative to the patient's anatomy, from an initial X-ray-CT-image. During the irradiation treatment, catheter displacements can occur due to patient movements. The current study develops an automatic analysis tool of EMT data sets recorded with a solenoid sensor to assure concordance of the source movement with the treatment plan. The tool combines machine learning techniques such as multi-dimensional scaling (MDS), ensemble empirical mode decomposition (EEMD), singular spectrum analysis (SSA) and particle filter (PF) to precisely detect and quantify any mismatch between the treatment plan and actual EMT measurements. We demonstrate that movement artifacts as well as technical signal distortions can be removed automatically and reliably, resulting in artifact-free reconstructed signals. This is a prerequisite for a highly accurate determination of any deviations of dwell positions from the treatment plan.

Authors with CRIS profile

Godehard Lahmer 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

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

How to cite

APA:

Goetz, T.I., Lahmer, G., Strnad, V., Bert, C., Hensel, B., Tome, A.M., & Lang, E.W. (2017). A tool to automatically analyze electromagnetic tracking data from high dose rate brachytherapy of breast cancer patients. PLoS ONE, 12(9). https://dx.doi.org/10.1371/journal.pone.0183608

MLA:

Goetz, Th. I., et al. "A tool to automatically analyze electromagnetic tracking data from high dose rate brachytherapy of breast cancer patients." PLoS ONE 12.9 (2017).

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