Abstract
Concomitant exposures in radiotherapy arise from planning CT scans and simulation imaging, portal imaging, cone-beam CT (CBCT) and kV verification images. The addition of a new linac capable of image guided radiotherapy, using the Varian On-Board Imager (OBI) system, meant new imaging protocols needed to be developed. Baseline dose measurements from planning CT scans were required, in addition to measurements collected using the OBI CBCT system.
Effective doses were measured on the CT Simulator and CBCT using TLDs and an anthropomorphic phantom. The effective doses obtained for the CTSim for pelvis and abdomen scans were 7 and 9 mSv respectively. Effective doses obtained from the CBCT ranged from 3mSv for a low dose pelvis scan to 24mSv for a standard dose thorax scan.
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© 2009 Springer-Verlag Berlin Heidelberg
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Potts, R., Oatey, M. (2009). An Investigation of the concomitant doses from Cone Beam CT and CT simulation in Radiotherapy. In: Dössel, O., Schlegel, W.C. (eds) World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. IFMBE Proceedings, vol 25/1. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03474-9_11
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DOI: https://doi.org/10.1007/978-3-642-03474-9_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-03472-5
Online ISBN: 978-3-642-03474-9
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