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1.
Appl Radiat Isot ; 105: 299-302, 2015 Nov.
Article in English | MEDLINE | ID: mdl-26386504

ABSTRACT

This paper aims to evaluate the feasibility of applying LiF:Mg,Ti microdosimeters as a new method of dosimetry to volumetric-modulated arc therapy (VMAT) RapidArc. The response of microdosimeters presented a maximum variation of ±3.18% and ±0.510% using optically stimulated luminescence (OSL) and thermoluminescence (TL) techniques, respectively. Although studies were conducted on LiF:Mg,Ti microdosimeters previously, the microdosimeters in this study showed precision and high potential of application in VMAT dosimetry and in the verification of treatment planning using the VMAT technique.


Subject(s)
Radiometry/methods , Radiotherapy, Intensity-Modulated/standards , Fluorides , Humans , Lithium Compounds , Luminescence , Magnesium , Phantoms, Imaging , Polymethyl Methacrylate , Quality Control , Radiometry/instrumentation , Radiometry/statistics & numerical data , Radiotherapy Dosage , Radiotherapy Planning, Computer-Assisted , Radiotherapy, Intensity-Modulated/statistics & numerical data , Thermoluminescent Dosimetry/instrumentation , Thermoluminescent Dosimetry/methods , Thermoluminescent Dosimetry/statistics & numerical data , Titanium
2.
Appl Radiat Isot ; 70(7): 1360-2, 2012 Jul.
Article in English | MEDLINE | ID: mdl-22342311

ABSTRACT

This paper compares the performance of CaSO4:Dy and LiF dosimeters irradiated with a 15 MV photon beam of a clinical linear accelerator to 0.1-10 Gy in a liquid water. The dose-response curves are linear up to 5 Gy. The average TL sensitivity of CaSO4:Dy is 26 and 287 times higher than the sensitivities of LiF:Mg,Ti and microLiF:Mg,Ti, respectively. CaSO4:Dy has an intrinsic efficiency 71% and 94% higher than the intrinsic efficiencies of LiF:Mg,Ti and microLiF:Mg,Ti, respectively.


Subject(s)
Phantoms, Imaging , Photons , Thermoluminescent Dosimetry/instrumentation , Calcium Sulfate/analysis , Dose-Response Relationship, Radiation , Limit of Detection
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