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PLAY-DOH® AND WATER-SOAKED GAUZE SPONGES AS ALTERNATIVE BOLUS MATERIAL FOR COBALT-60 TELETHERAPY

Authors


Address correspondence and reprint requests to M. Walker, DVM, at the above address. E-mail: mwalker@cvm.tamu.edu

Abstract

A study was performed to determine if carefully made boluses of either Play-Doh®, or water-soaked cotton gauze sponges differed from the commercial bolus material, Superflab, in producing maximum radiation dose when irradiated with cobalt-60 photons. The radiation doses were measured with thermoluminescent dosimeters calibrated to be accurate for cobalt-60 photon energies at doses less than 10.0 cGy. The resulting radiation doses were similar when using Play-Doh®, water-soaked sponges, or Superflab. Doses resulting from Play-Doh® boluses more consistently approximated those of Superflab. The results of this study suggest that either Play-Doh® or water-soaked cotton gauze sponges can suffice as material for carefully made bolus for cobalt-60 teletherapy.

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