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Title
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Initial assessment of tumor tracking with a gimbaled linac system in clinical circumstances: A patient simulation study
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Author
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Abstract
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| Purpose: To have an initial assessment of the Vero Dynamic Tracking workflow in clinical circumstances and quantify the performance of the tracking system, a simulation study was set up on 5 lung and liver patients. Methods and materials: The preparatory steps of a tumor tracking treatment, based on fiducial markers implanted in the tumor, were executed allowing pursuit of the tumor with the gimbaled linac and monitoring X-rays acquisition, however, without activating the 6 MV beam. Data were acquired on workflow time-efficiency, tracking accuracy and imaging exposure. Results: The average time between the patient entering the treatment room and the first treatment field was about 9 min. The time for building the correlation model was 3.2 min. Tracking errors of 0.55 and 0.95 mm (1 sigma) were observed in PAN/TILT direction and a 2D range of 3.08 mm. A skin dose was determined of 0.08 mGy/image, with a source-to-skin distance of 900 mm and kV exposure of 1 mAs. On average 1.8 mGy/min kV skin dose was observed for 1 Hz monitoring. Conclusion: The Vero tracking solution proved to be fully functional and showed performance comparable with other real-time tracking systems. (C) 2013 Elsevier Ireland Ltd. All rights reserved. Radiotherapy and Oncology 106 (2013) 236-240 |
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Language
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English
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Source (journal)
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Radiotherapy and oncology. - Amsterdam
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Publication
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Amsterdam
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2013
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ISSN
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0167-8140
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DOI
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10.1016/J.RADONC.2012.12.015
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Volume/pages
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106
:2
(2013)
, p. 236-240
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ISI
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000318583600016
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Full text (Publisher's DOI)
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