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http://dx.doi.org/10.7742/jksr.2016.10.8.591

Determination of the Equivalent Energy of a 6 MV X-ray Beam  

Kim, Jong-Eon (Department of Radiological Science, Kaya University)
Park, Byung-Do (Department of Radiation Oncology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine)
Publication Information
Journal of the Korean Society of Radiology / v.10, no.8, 2016 , pp. 591-596 More about this Journal
Abstract
The purpose of this study is to determine the equivalent energy of a 6MV X-ray beam in the experiment. The half-value layer (HVL) of lead for the 6 MV X-ray beam was measured using an ionization chamber. The linear attenuation coefficients were calculated with HVL. And, the mass attenuation coefficient was obtained by dividing the linear attenuation coefficient by the density of lead. The equivalent energy of mass attenuation coefficient was determined using the photon energy versus mass attenuation coefficient data of lead given by National Institute of Standards and Technology (NIST). In conclusion, the equivalent energy of the 6 MV X-ray beam was determined to be 1.61 MeV. This equivalent energy was determined to be about 30% lower than reported by Reft. The reason is presumed to be due to the presence of an air cavity between the lead attenuators.
Keywords
Half value layer; Mass attenuation coefficient; Equivalent energy; Ionization chamber;
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Times Cited By KSCI : 1  (Citation Analysis)
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