Medical applications of optically stimulated luminescence dosimeters (OSLDs)

Yukihara, E.G.; Gasparian, P; Sawakuchi, Gabriel O.; Ruan, Chun; Ahmad, Salahuddin; Kalavagunta, Chaitanya; Clouse, W; Sahoo, Narayan; Titt, Uwe

doi:10.1016/j.radmeas.2009.12.034

Cited by 53 publications

(34 citation statements)

References 22 publications

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“…1. The dosimeter material is housed in a plastic light-tight casing, measuring 10 Â 10 Â 2 mm 3 . The sensitive material, the aluminum oxide doped with carbon, is a 5 mm diameter disk approximately 0.2 mm thick, but thin polyester films on either side of the disk, used for binding, put the total disk thickness near 0.3 mm.…”

Section: Iia Dosimeter and Readout Systemmentioning

confidence: 99%

“…22 The detectors were positioned at a depth of approximately 10 cm in a phantom from the RPC. The phantom measured approximately 38(L) Â 20(W) Â 28(H) cm 3 (Fig. 2).…”

Section: Iib Photon Measurementsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7] The material used for OSL dosimetry works much like thermoluminescent dosimeters (TLDs). Electrons, which are liberated after exposure to ionizing radiation, are trapped in energy traps within the forbidden energy gap created by crystal defects.…”

Section: Introductionmentioning

confidence: 99%

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Angular dependence of the nanoDot OSL dosimeter

et al. 2011

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Purpose: Optically stimulated luminescent detectors (OSLDs) are quickly gaining popularity as passive dosimeters, with applications in medicine for linac output calibration verification, brachytherapy source verification, treatment plan quality assurance, and clinical dose measurements. With such wide applications, these dosimeters must be characterized for numerous factors affecting their response. The most abundant commercial OSLD is the InLight/OSL system from Landauer, Inc. The purpose of this study was to examine the angular dependence of the nanoDot dosimeter, which is part of the InLight system. Methods: Relative dosimeter response data were taken at several angles in 6 and 18 MV photon beams, as well as a clinical proton beam. These measurements were done within a phantom at a depth beyond the build-up region. To verify the observed angular dependence, additional measurements were conducted as well as Monte Carlo simulations in MCNPX. Results: When irradiated with the incident photon beams parallel to the plane of the dosimeter, the nanoDot response was 4% lower at 6 MV and 3% lower at 18 MV than the response when irradiated with the incident beam normal to the plane of the dosimeter. Monte Carlo simulations at 6 MV showed similar results to the experimental values. Examination of the results in Monte Carlo suggests the cause as partial volume irradiation. In a clinical proton beam, no angular dependence was found. Conclusions: A nontrivial angular response of this OSLD was observed in photon beams. This factor may need to be accounted for when evaluating doses from photon beams incident from a variety of directions.

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Section: Iia Dosimeter and Readout Systemmentioning

confidence: 99%

“…22 The detectors were positioned at a depth of approximately 10 cm in a phantom from the RPC. The phantom measured approximately 38(L) Â 20(W) Â 28(H) cm 3 (Fig. 2).…”

Section: Iib Photon Measurementsmentioning

confidence: 99%

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Angular dependence of the nanoDot OSL dosimeter

et al. 2011

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“…Technical advances in the production of OSL materials and availability of the reading devices make them a very promising dosimetric tool for medical purposes. Current developments and specific applications of OSLDs in diagnostic radiology and radiation therapy are reconsidered [31][32][33].…”

Section: ""% #% #"mentioning

confidence: 99%

Assessment of patient dose in medical processes byin-vivodose measuring devices: A review

Tunçel

2016

EPJ Web Conf.

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"#!# In-vivo dosimetry (IVD) in medicine especially in radiation therapy is a well-established and recommended procedure for the estimation of the dose delivered to a patient during the radiation treatment. It became even more important with the emerging use of new and more complex radiotherapy techniques such as intensity-modulated or image-guided radiation therapy. While IVD has been used in brachytherapy for decades and the initial motivation for performing was mainly to assess doses to organs at risk by direct measurements, it is now possible to calculate 3D for detection of deviations or errors. Invivo dosimeters can be divided into real-time and passive detectors that need some finite time following irradiation for their analysis. They require a calibration against a calibrated ionization chamber in a known radiation field. Most of these detectors have a response that is energy and/or dose rate dependent and consequently require adjustments of the response to account for changes in the actual radiation conditions compared to the calibration situation. Correction factors are therefore necessary to take. Today, the most common dosimeters for patients' dose verification through in-vivo measurements are semiconductor diodes, thermo-luminescent dosimeters, optically stimulated luminescence dosimeters, metal-oxidesemiconductor field-effect transistors and plastic scintillator detectors with small outer diameters.

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“…This causes a direct impact on the production cost, with raw material economy resulting in optimized financial costs, also being environmentally friendly. Transition metals and rare earth doped materials exhibit such features, being widely used in several applications as solid-state lasers [1,2], scientific research [3,4], medicine and dosimetry [5][6][7], and sensing and optical communications [8], just to name a few examples.…”

Section: Introductionmentioning

confidence: 99%

Structural and photoluminescent properties of the MgGa2O4:Co2+ ceramic compound revisited after two decades

et al. 2015

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Abstract:In this work, we revisit and show how the structural and photoluminescent properties of the MgGa 2 O 4 ceramic compound have been kept unchanged for more than two decades. The obtained results confirm the high quality, radiative efficiency, and chemical stability of this ceramic, proving that the material is a strong candidate to be used in optical device applications with relatively long useful life.

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Medical applications of optically stimulated luminescence dosimeters (OSLDs)

Cited by 53 publications

References 22 publications

Angular dependence of the nanoDot OSL dosimeter

Angular dependence of the nanoDot OSL dosimeter

Assessment of patient dose in medical processes byin-vivodose measuring devices: A review

Structural and photoluminescent properties of the MgGa2O4:Co2+ ceramic compound revisited after two decades

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