Effects of the pre-irradiation storage procedure on the dose response of a Fricke xylenol orange gel dosimeter

• Autorzy: Liosi G. M. , Giacobbo F. , Pignoli E. , Carrara M. , Gambarini G. , Mariani M.

Identyfikatory

DOI

10.1515/nuka-2015-0099

• Konferencja: International Conference on Development and Applications of Nuclear Technologies NUTECH 2014 (21-24.09.2014, Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

The Fricke xylenol orange (FX) gel system is a chemical dosimeter characterized by good sensitivity, linear dose response, tissue equivalence, no toxicity, easy preparation, reproducibility and low cost. Thanks to the presence of the gelatinous matrix, the system is particularly suitable to perform reliable 3D mapping of the absorbed dose spatial distribution via magnetic resonance imaging (MRI) or optical techniques. The aim of this work is to study in a systematic way the influence of the pre-irradiation storage procedure upon sensitivity, dose response stability and lifetime of use of a FX gel system made with gelatin from porcine skin subjected to homogeneous irradiation. For this purpose, different pre-irradiation storage procedures, in terms of temperature and duration of each storage step, were investigated. In order to evaluate the dose response stability, the optical analyses of the samples were performed up to 6 hours after irradiation. Moreover, the samples were irradiated at time intervals of 24 hours for up to 7 days after preparation in order to evaluate the system lifetime of use. Regardless of their thermal and temporal life, the samples show linear dose responses in the investigated dose range (3–24 Gy) and an increase of sensitivity with the time elapsed between preparation and irradiation. Among the three pre-irradiation storage procedures considered here, a procedure that provides the best dose response stability and lifetime of use was identifi ed and recommended for further use. The analyzed dosimetric system possesses good properties that make it promising for medical application, particularly concerning the evaluation of pre-treatment plan quality assurance within the conformational external beam radiotherapy.

Słowa kluczowe

EN

radiation dosimetry; Fricke-gelatin-xylenol orange dosimeter; optical absorbance measurement

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2015
• Tom: Vol. 60, No. 3, part 2
• Strony: 603--607
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Liosi G. M.

• Department of Energy, Nuclear Engineering Division-CeSNEF, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: [phone]

autor

Giacobbo F.

• Department of Energy, Nuclear Engineering Division-CeSNEF, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: [phone]

autor

Pignoli E.

• Medical Physics Unit, Fondazione IRCCS, Istituto Nazionale dei Tumori, via Venezian, Milano, I-20113, Italy

autor

Carrara M.

• Medical Physics Unit, Fondazione IRCCS, Istituto Nazionale dei Tumori, via Venezian, Milano, I-20113, Italy

autor

Gambarini G.

• Department of Physics, Università degli Studi di Milano and INFN, via Celoria 16, Milano, I-20133 Italy

autor

Mariani M.

• Department of Energy, Nuclear Engineering Division-CeSNEF, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: [phone]

Bibliografia

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