Gel Dosimeter for Depth-Dose Measurements

Andrews, Howard L.; Murphy, Raymond E.; LeBrun, Edward J.

doi:10.1063/1.1715877

Cited by 69 publications

(26 citation statements)

References 6 publications

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“…Gelatin dosimetry has been studied since 1950’s [62], [63], when the gel molecular proprieties began to be studied after ionizing radiation exposures. Some of these gelatins were used to prepare Fricke gel dosimeters, becoming the first dosimetric system able to three-dimensionally map the absorbed dose in a non-destructive and non-invasive manner [64]–[66].…”

Section: Introductionmentioning

confidence: 99%

Prevention of Transfusion-Associated Graft-versus-Host Disease by Irradiation: Technical Aspect of a New Ferrous Sulphate Dosimetric System

et al. 2013

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Irradiation of whole blood and blood components before transfusion is currently the only accepted method to prevent Transfusion-Associated Graft-Versus-Host-Disease (TA-GVHD). However, choosing the appropriate technique to determine the dosimetric parameters associated with blood irradiation remains an issue. We propose a dosimetric system based on the standard Fricke Xylenol Gel (FXG) dosimeter and an appropriate phantom. The modified dosimeter was previously calibrated using a 60Co teletherapy unit and its validation was accomplished with a 137Cs blood irradiator. An ionization chamber, standard FXG, radiochromic film and thermoluminescent dosimeters (TLDs) were used as reference dosimeters to determine the dose response and dose rate of the 60Co unit. The dose distributions in a blood irradiator were determined with the modified FXG, the radiochromic film, and measurements by TLD dosimeters. A linear response for absorbed doses up to 54 Gy was obtained with our system. Additionally, the dose rate uncertainties carried out with gel dosimetry were lower than 5% and differences lower than 4% were noted when the absorbed dose responses were compared with ionization chamber, film and TLDs.

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Section: Introductionmentioning

confidence: 99%

Prevention of Transfusion-Associated Graft-versus-Host Disease by Irradiation: Technical Aspect of a New Ferrous Sulphate Dosimetric System

et al. 2013

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“…For example, dosimeters utilizing Fricke solution [6][7][8], polymers [9][10][11][12][13][14][15][16] and dyed plastics [17,18] have been successful in measuring radiation dose in three dimensions but not temporally. Electronic portal imaging devices (EPIDs) based on fluoroscopic [19,20] or solidstate radiation detection [21], as well as planar detector arrays [22] are capable of measuring radiation fields in two spatial dimensions.…”

Section: Introductionmentioning

confidence: 99%

A hybrid radiation detector for simultaneous spatial and temporal dosimetry

Poole

Trapp

Kenny

et al. 2011

Australas Phys Eng Sci Med

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In this feasibility study an organic plastic scintillator is calibrated against ionisation chamber measurements and then embedded in a polymer gel dosimeter to obtain a quasi-4D radiation detector. This hybrid dosimeter was irradiated with megavoltage x-rays from a linear accelerator, with temporal measurements of the dose rate being acquired by the scintillator and spatial measurements acquired with the gel dosimeter. The detectors employed in this study are radiologically equivalent; and we show that neither detector perturbs the intensity of the radiation field of the other. By employing these detectors in concert, spatial and temporal variations in the radiation intensity can now be detected and gel dosimeters can be calibrated for absolute dose from a single irradiation.

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“…In 1957 Andrews and colleagues studied the dose distribution and measurements of the pH of sensitive gels by spectroscopy [6]. The use of these gels as a dosimeter began with Gore and colleagues in 1984 when it was investigated the Fricke gels, initially studied by Fricke and Morse in 1927, based on the principle of oxidation, and recorded the relaxation properties in nuclear magnetic resonance (NMR) and showed that the concentration of ferric ions could be quantified by this technique [7].…”

Section: Magic-f Gel Dosimetermentioning

confidence: 99%