Novel radio-chromic solution dosimeter for radiotherapy treatment planning

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Nitro blue tetrazolium (NBT) solution dosimeters were prepared and investigated based on radiation-induced reduction of NBT2+. NBT solution dosimeters containing different concentrations of NBT dye from 1 to 5 mM were prepared in a solution of ethanol. The dosimeters were irradiated with 6 MV X-ray beam at doses up to 30 Gy. The dose sensitivity of NBT solution increases strongly with increase of concentrations of NBT dye. The dose response of NBT dosimeters increases remarkably by addition of various concentrations of sodium formate (0.5, 2.5 and 5 mM). It becomes more remarkable with increasing pH value of NBT-sodium formate dosimeters. The sensitivity of the solution increased fairly with increase of irradiation temperature, therefore, the response of the solutions has to be corrected under actual processing conditions. The stability of solution dosimeters after irradiation was very high up to 30 days. © 2012 Associazione Italiana di Fisica Medica.




Rabaeh, K. A., Moussa, A. A., Basfar, A. A., & Msalam, R. I. (2013). Novel radio-chromic solution dosimeter for radiotherapy treatment planning. Physica Medica, 29(4), 374–378.

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