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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 86 for “"dosimetric"”.
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Advanced brachytherapy dosimetric considerations
The practice of brachytherapy and brachytherapy dosimetry was investigated with emphasis on evaluations of dose distributions and shielding considerations for both photon- and neutron-emitting radionuclides. Monte Carlo simulation methods were employed to calculate dose distributions for virtual …
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Development of A Remote Dosimetric Audit Framework For Carbon Therapy
<p>Carbon ion therapy is available at over a dozen institutions around the world and is being employed for treatment of cancer. The increased biological effect of carbon compared to conventional photon-based radiotherapy holds promise for the therapeutic benefit in historically radioresistant …
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Dosimetric characterization of a miniature x-ray source for biophysics studies
Tritium is a low energy beta emitter that is found in abundance at CANDU nuclear power plants and is a cause of concern since it accounts for roughly thirty three percent of the total occupational exposure of nuclear workers. According to current standards, the radiation weighting factor for all …
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Combined methods and instrumentation for dosimetric monitoring of the large fluence hadron irradiations /
Dosimetry in the routine sense is the measurement of the absorbed dose in biological tissues and matter delivered by ionizing radiation or particle beams. Dosimetry is widely applied in the field of medical physics where it is inevitable for assessment of the radiation dose received by personnel …
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A Complete Dosimetric Model of the Gamma Knife Perfexion Using Penelope Monte Carlo Codes
The Gamma Knife Perfexion is a radiosurgical treatment device used to irradiate targets in the head. It uses 192 high-activity Cobalt-60 sources collimated to a common focus to impart radiological damage to the target structure while minimizing dose to adjacent healthy tissue. Tungsten collimators …
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A Dosimetric Study of a VMAT Head and Neck Treatment Plan Using TLDs and Gafchromic Films
… used in side an anthropomorphic phantom for this dosimetric study. These two dosimeters have been used to determine the dose in specific points and to compare the results with the computer plan. Also, EBT2 films have been used to study the isodose distribution on the anthropomorphic phantom …
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"Dosimetric Properties of Clinac Electron Beam Depth Doses: An Investigation of Electron Beam ""Golden"" Data Set"
Made available in DSpace on 2017-07-06T18:55:55Z (GMT). No. of bitstreams: 2 Qayyum_Muqeem_A_MS.pdf: 3223744 bytes, checksum: a4b1aa0ed198965f4f43c8882d87d2ec (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 2006
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Study of Dosimetric and Thermal Properties of a Newly Developed Thermo-brachytherapy Seed for Treatment of Solid Tumors
Studies on the curative effects of hyperthermia and radiation therapy on treatment of cancer show strong evidence of synergistic enhancement when both radiation and hyperthermia treatment modalities are applied simultaneously. A variety of tissue heating approaches developed to date still fail to …
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DOSIMETRIC STUDY OF BETA-MINUS EMITTER PRASEODYMIUM-142 : APPLICATIONS IN MICROSPHERE BRACHYTHERAPY FOR HEPATOCELLULAR CARCINOMA AND BRACHYTHERAPY FOR OCULAR SQUAMOUS CELL CARCINOMA
A dosimetric study of the beta-minus emitter Praseodymium-142 (¹⁴²Pr) was performed and two main innovative applications of this source in brachytherapy are proposed: microsphere brachytherapy and eye plaque brachytherapy. ¹⁴²Pr (96.3% beta and 3.7% gamma) has recently gained increased attention …
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Volumetric modulated Arc Therapy versus 3D conformal radiotherapy in the treatment of locally advanced cervical cancer. A single institution, comparative dosimetric study
… in the management of LACC. Aim: To compare dosimetric parameters between VMAT and 3D-CRT in the management of LACC. Setting: The study analysed patients treated at Groote Schuur Hospital between May and December 2017. Method: A non-randomized comparative retrospective study. EBRT plans for …
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Volumetric Modulated Arc Therapy Evaluation With The Radiological Physics Center Head and Neck Phantom
… in terms of both treatment plan quality and dosimetric delivery accuracy using the Radiological Physics Center (RPC) head and neck (H&N) phantom. Clinically relevant treatment plans were created for the phantom using typical prescription and dose constraints for Elekta VMAT (planned with …
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Dosimetric comparison of volumetric modulated arc therapy and three dimensional conformal radiotherapy in the adjuvant setting for the management of gastric cancer : target volume coverage and normal tissue sparing
Whilst the benefit of adjuvant radiotherapy in gastric cancer is known, the optimal means of delivery, including two dimensional conventional, three dimensional conformal radiotherapy, intensity modulated radiotherapy and volumetric modulated arc therapy is less certain. The purpose of this study …
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Integration of VMC++ into a Commercial Treatment Planning System
… 1x1 cm2. Geometric validation was successful. Dosimetric validation was performed with respect to DOSXYZnrc on a water phantom, resulting in agreement within statistical uncertainty except for slight differences at the surface of the phantom. Dosimetric comparison was made for a head-and-neck …
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Development of 3D-Printed Patient Specific Bolus For Clinical Use In to tal Scalp Irradiation
… to the head phantom for both bolus caps, and dosimetric validation was performed using thermoluminescent dosimeters (TLD). The resulting 3D-printed bolus caps had excellent conformality to the phantom scalp, with air gaps of less than 4 mm. Dosimetric measurements demonstrated the bolus caps …
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Accelerator-Based Neutron Branchytherapy
… 150 Watts. The insertion length is 10 cm. The dosimetric characteristics were simulated using the Monte Carlo code MCNP and the treatment times were then calculated for a given heat load. The simulations and calculations show that the fast neutron dose is the dominant dose component for all the …
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Automated to ols for Contour Review in Radiotherapy
… examined the relationship between geometric and dosimetric agreement metrics amongst normal tissue auto-contours and clinical contours in discerning whether the current state of automated contour QA (which mainly relies on geometric comparisons) was appropriately defining contour errors and …
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