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Radiation Protection Dosimetry Advance Access published online on August 6, 2007
Radiation Protection Dosimetry, doi:10.1093/rpd/ncm179
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

RADIATION SAFETY SURVEY ON A FLATTENING FILTER-FREE MEDICAL ACCELERATOR

O. N. Vassiliev*, U. Titt, S. F. Kry, R. Mohan and M. T. Gillin

The University of Texas MD Anderson Cancer Center, Holcombe Blvd, Houston, TX, 77030, USA

* Corresponding author: onvassil{at}mdanderson.org

Received October 31, 2006, amended December 20, 2006, accepted January 25, 2006

Dose rates at several locations outside a treatment room were measured for 6 and 18 MV photon beams from a Varian Clinac 21EX accelerator operated with and without a flattening filter. Also, dose rates in the treatment room due to activation were measured at 18 MV. An analysis of the measured data is presented. The results suggest that substantial reduction in doses outside the treatment room and lower activation can be achieved with a flattening-filter free accelerator.


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