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 9 of 9 for “"Gel Dosimetry"”.
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Cone Beam Optical Computed Tomography-Based Gel Dosimetry
… target accuracy of ± 5% for the dose delivery. Gel dosimetry is an attractive option for realizing a tissue-equivalent, 3D dose verification tool with high resolution readout capabilities. However, much important work remains to be completed prior to its acceptance in the clinic. The careful …
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Polymer Gel Dosimetry in Magnetic Resonance-Image Guided Radiation Therapy
… at best in quasi-3D. The implementation of 3D dosimetry into clinical dosimetry requires attention to safety, accuracy, and rigorous validation prior to any routine patient treatment. Polymer gel detectors have previously been shown to be a useful tool to capture complex 3D dose distributions …
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HIGH FIELD MAGNETIC RESONANCE IMAGING-BASED GEL DOSIMETRY FOR SMALL RADIATION FIELDS
… disequilibrium. Conventional radiation dosimetry techniques have limitations for small fields because detector size may be large compared to radiation field size and/or dose acquisition may be restricted to one or two dimensions. Polymer gel dosimetryer, is a three-dimensional (3D) …
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An optical computed tomography scanner for three dimensional gel dosimetry of radiotherapy dose distributions
… measured dose distributions in true 3D. True 3D dosimetry systems have been a subject of research for more than 3 decades. Gel dosimetry with optical computed tomography (CT) scanning using visible light wavelengths has been under investigation and development for much of this time. A lack of …
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Application and Development of Algebraic Reconstruction Algorithms for High Dose Rate Brachytherapy Gel Dosimetry with Optical Computed Tomography Readout
… 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 distributions, ruining the dosimeter’s accuracy. …
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Evaluation of yttrium-90 positron emission tomography dosimetry
… tumors. Radioembolization dose planning and dosimetry are based on crude, inaccurate assumptions due to the lack of knowledge of patient specific <sup>90</sup>Y microsphere distribution. In recent years, the very small 3.1867e-5 internal pair production decay branch of <sup>90</sup>Y has been …
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The dual development of an optical tomographic scanner and three dimensional gel dosimeter for complex radiotherapy verification
… delivered are verified by volumetric gel dosimetry. 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 …
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Development of Advanced Mr-Guided Adaptive Radiation Therapy Methods For Head & Neck Cancers On The 1.5T Mr-Linac
… of high- and low-density materials using gel dosimetry. The second project focused on validating our clinical workflow for the first ten HNC patients treated on the MR-linac. We demonstrated that we could create quality adaptive treatment plans for HNC but that the poor autosegmentation …
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Evaluation of Polymer Gel Dosimeters For Measurements of Dose and Let In Proton Beams
… project 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 …