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Current Directions in Biomedical Engineering

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Buzug, Thorsten M. / Haueisen, Jens / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Kraft, Marc / Lenarz, Thomas / Leonhardt, Steffen / Malberg, Hagen / Penzel, Thomas / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Urban, Gerald A.


CiteScore 2018: 0.47

Source Normalized Impact per Paper (SNIP) 2018: 0.377

Open Access
Online
ISSN
2364-5504
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Comparison of treatment plans calculated by Ray Tracing and Monte Carlo algorithms for head and thorax radiotherapy with Cyberknife

Kirsten Galonske
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  • Klinikum Stadt Soest, Strahlentherapie Deutsches Cyberknife-Zentrum, Senator-Schwartz-Ring 8, 59494 Soest, Germany
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/ Martin Thiele
  • Klinikum Stadt Soest, Strahlentherapie Deutsches Cyberknife-Zentrum, Senator-Schwartz-Ring 8, 59494 Soest, Germany
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/ Iris Ernst
  • Klinikum Stadt Soest, Strahlentherapie Deutsches Cyberknife-Zentrum, Senator-Schwartz-Ring 8, 59494 Soest, Germany
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/ Ralph Lehrke / Waldemar Zylka
  • Westphalian University, Department of Electrical Engineering and Applied Natural Sciences, Neidenburger Str. 43, 45877 Gelsenkirchen, Germany
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Published Online: 2017-09-07 | DOI: https://doi.org/10.1515/cdbme-2017-0136

Abstract

This study investigates differences between treatment plans generated by Ray Tracing (RT) and Monte Carlo (MC) calculation algorithms in homogeneous and heterogeneous body regions. Particularly, we focus on the head and on the thorax, respectively, for robotic stereotactic radiotherapy and radiosurgery with Cyberknife. Radiation plans for tumors located in the head and in the thorax region have been calculated and compared to each other in 47 cases and several tumor types.

Assuming MC as the algorithm of highest accuracy it is shown that based on selected dose parameters, RT slightly underestimates the dose in homogeneous regions and overestimates in heterogeneous regions. In addition, deviations occur due to tumor size rendering large differences for small tumors. We conclude that dose prescriptions for radiotherapy treatments should differentiate between RT and MC calculation algorithm. This is especially important for small tumors in heterogeneous body regions.

Keywords: Treatment plans; Monte Carlo; Ray Tracing; Cyberknife; Tumour size and volume; dose prescription

About the article

Published Online: 2017-09-07


Citation Information: Current Directions in Biomedical Engineering, Volume 3, Issue 2, Pages 647–650, ISSN (Online) 2364-5504, DOI: https://doi.org/10.1515/cdbme-2017-0136.

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©2017 Kirsten Galonske et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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