Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"dosimeters"”.
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Tissue-equivalent and nanoparticle doped resin dosimeters
… make, use and analyse these new simplified resin dosimeters.
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Quality Assurance of Advanced Treatment Modalities Using Presage® Dosimeters
… procedure was created. The PRESAGE<sup>®</sup> dosimeters were extensively tested for dose stability over a range of time for remote dosimetry applications. The effect of temperature changes before, during and after irradiation was investigated. The dosimeter was found to be appropriate for …
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Wirelessly addressable chemiresistors : carbon nanotube-based chemical sensors and dosimeters
… improving the sensitivity of diene-type alkene dosimeters are discussed.
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Effects of very high dose rates on the response of calcium fluoride thermoluminescent dosimeters
Digitized by Kansas Correctional Industries
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Effects of very high dose rates on the response of calcium fluoride thermoluminescent dosimeters
Digitized by Kansas Correctional Industries
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Study of the use of Electret Ion chambers as radom dosimeters in South Africa
Radon is a naturally occuring radioactive gas which has been shown to be a major contribution to background dose. The underground mines in South Africa present a major occupational hazard. A need for cheap personal monitoring has been identified. In this thesis, commercially available electret ion …
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Evaluation of Polymer Gel Dosimeters For Measurements of Dose and Let In Proton Beams
… assessed the effectiveness of polymer gel dosimeters as tools for measuring the dose deposited by and LET of a proton beam. A total of three BANG® dosimeter formulations were evaluated: BANG®-3-Pro-2 BANGkits™ for dose measurement and two BANG®-3 variants, the LET-Baseline and LET-Meter …
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Commissioning of Micro-Cube Thermoluminescent Dosimeters For Small Field Dosimetry Quality Assurance In Radiotherapy
… test the reproducibility and accuracy of the dosimeters, they were first evaluated under a single small field beam in a simple geometric configuration, then in anthropomorphic SRS head phantoms. Agreement between calculated dose and measured dose was evaluated. Following satisfactory results …
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Extending The Lifetime of Optically Stimulated Dosimeters For Use In Output Checks At Iroc- Houston
<p>Purpose: Optically Stimulated Luminescent Dosimeters (OSLDs) are a prominent form of in-vivo dosimeter used both in clinics as well as for the audits of radiological<br />equipment at the Imaging and Radiation Oncology Core (IROC)-Houston. These<br />dosimeters have a recommended dose limit of …
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The use of thermoluminescent dosimeters for In-vivo dosimetry in a fast neutron therapy beam
Thermoluminescent detectors (TLD-700) have been investigated for absorbed dose measurements in a p(66)/Be neutron therapy beam at the National Accelerator Centre. Chips were selected based on their reproducibility and chip individual neutron calibration factors were derived. The dose non-linearity …
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Fault-tolerant passively integrating in-vivo dosimeters for feedback-enabled proton therapy (IF²D, or integrating feedback F-center dosimeter)
Current dosimeters used in radiotherapy for cancer treatment fail to distinguish between radiation received by the targeted tumor and the surrounding healthy tissue. The Integrating Feedback F-center Dosimeter is designed to be fault-tolerant, with the capability to distinguish the radiation dose …
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Evaluation of Presage® Dosimeters For Brachytherapy Sources and The 3D Dosimetry and Characterization of The New Agx100 125I Seed Model
… Oncoseed<sup>TM</sup> using PRESAGE<sup>®</sup> dosimeters to establish PRESAGE<sup>®</sup> as a suitable brachytherapy dosimeter. The new AgX100 <sup>125</sup>I seed model (Theragenics Corporation) was then characterized using PRESAGE<sup>®</sup> following the TG-43 protocol.</p> …
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Optimization of the MgS:Eu:Sm phosphor for potential use as an optically stimulated personnel dosimeter
… phosphor for laser stimulated personnel dosimeters. Optically stimulated luminescence (OSL) dosimeters are advantageous in that they provide a faster, isothermal dose measurement than conventional thermoluminescent dosimeters. The effects of activator concentration and chemical …
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Measuring terrestrial wildlife external radiation exposure under field conditions
… and guidance developed on the selection of dosimeters for different sizes of terrestrial animals. To test dosimeters under field conditions, a field study using reindeer in an area of Norway with elevated 137Cs was initiated. The dosimeter selection guidance was used to identify four passive …
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Effects of different frequencies and other variables on the salicylic acid and terephthalic acid dosimeters applied to the advanced Fenton process and activated carbon cloth
… salicylic acid (SA) and terephthalic acid (TA) dosimeters. Using SA, the ability of the frequencies to produce hydroxyl radicals in the presence of the oxidant hydrogen peroxide was assessed. Additionally, the use of selected ultrasonic frequencies was studied in combination with hydrogen …
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Volumetric, Magnetic Resonance-Visible, and Radiation-Sensitive Detectors For Magnetic Resonance Image-Guided Radiation Therapy
… and novel formulations of radiochromic gel dosimeters. After the optimal radiochromic gel formulation was identified, it was characterized for dose linearity, radiological properties, reproducibility, time stability, energy dependence, reusability, dose rate dependence, fractionation …
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Development of A Remote Dosimetric Audit Framework For Carbon Therapy
… used for these audits are thermoluminescent dosimeters (TLD) and optically-stimulated luminescent dosimeters (OSLD) and GafChromic film.</p> <p>The aim of this work will be to characterize dosimeters and materials for use in carbon radiotherapy and combine these tools to create an end-to-end …
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The dual development of an optical tomographic scanner and three dimensional gel dosimeter for complex radiotherapy verification
… The development of tissue equivalent gel dosimeters that provide an integrated assessment of the dynamic treatments, are primarily imaged with Magnetic Resonance Imaging (MRI).This thesis describes the dual development and assessment of an optical tomographic scanner and normoxic gel …
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Application and Development of Algebraic Reconstruction Algorithms for High Dose Rate Brachytherapy Gel Dosimetry with Optical Computed Tomography Readout
… simple to use, accurate, and complete dosimeters for brachytherapy. Radiochromic gel dosimeters with optical computed tomography (CT) readout would provide such a dosimeter, but the insertion of brachytherapy catheters into the gel cause streak artifacts in the reconstructed dose …
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