Graduate Thesis Or Dissertation
 

Skin depth dose response of an ionization chamber and a thermo-luminescent dosimeter system using low energy X-rays

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/73666749t

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  • The use of Ionization Chambers and Thermo-luminescent dosimeters (TLD's) in the medical field has established a need to determine if the skin depth dose response is comparable between the two detectors. This research will determine if the dose response from an Ionization chamber is comparable to a Thermo-luminescent dosimeter system to improve patient dosimetry. The TLD's to be utilized are the thinnest LiF TLD-100's currently manufactured (0.3175 cm x 0.3175 cm x 0.0152 cm). The TLD's were irradiated with a Radium-226 pin-wheel source to construct the appropriate calibration curve. The calibration curve in turn was used to determine doses to the experimental TLD's for various skin and tissue depths. A Sedecal X Plus X-ray machine was used to determine the dose at certain depths within a Plexiglas phantom material for both the Ionization chamber and TLD's. VARSKIN version 4 computational code and hand calculations were compared to the experimental data.
  • Keywords: Skin Dose, Thermoluminescent Dosimeters, Ionization Chamber
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