Abstract
Different dosimetric measurements to compare the radiation attenuation of a commercial bolus from Qfix against of our composites based on silicone rubber doped with aluminum, copper and bismuth powders or without any metal powders, were performed. The samples were irradiated with a 6 MV photon beam, generated by a Unique accelerator from Varian and as dosimetric detection system, an ArcCheck phantom from Sun Nuclear was used. Considering that a radiotherapy treatment requires multiple irradiations, the samples were irradiated with 5000 MU at a distance of 100 cm from the source. The results obtained showed that the percentage difference in dose at a thickness of 1.8 cm is over 6% (for samples doped with Cu or Bi) and less than 6% (for the sample not doped or the sample doped with Al), compared to the attenuation obtained in the case of the commercial bolus from Qfix. Experimental results demonstrate that the composite samples based on silicone rubber doped with metallic particles can be used as an alternative in the treatment of some type of skin surface cancers using radiotherapy with photon radiation.
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