Browsing Nuclear Science and Engineering Institute electronic theses and dissertations (MU) by Thesis Advisor "Loyalka, Sudarshan K."
Now showing items 1-18 of 18
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3D imaging for brachytherapy patient and mold applicator positioning verification
(University of Missouri--Columbia, 2017)We developed a stereo vision method for 3D imaging of HDR brachytherapy skin cancer applicator positioning and tracking with respect to patients' anatomical features. The setup consists of two high-resolution scientific ... -
Aerosol evolution : explorations in DSMC and sectional techniques
(University of Missouri--Columbia, 2015)Understanding and improved modeling of aerosol evolution in nuclear reactor accidents is important in estimations of the nuclear source term as it is greatly affected by the formation and presence of aerosols in the reactor ... -
Development of instrumentation and techniques for preclinical image guided microirradiation
(University of Missouri--Columbia, 2012)Radiation therapy accounts for more than half of cancer treatments in the US, and in order to provide the most effective treatment to patients, new developments are implemented each year. Before a novel radiation therapy ... -
Direct simulation Monte Carlo exploration of charge effects on aerosol evolution
(University of Missouri--Columbia, 2012)Aerosols are potentially generated both during normal operations in a gas cooled Generation IV nuclear reactor and in all nuclear reactors during accident scenarios. These aerosols can become charged due to aerosol generation ... -
Direct simulation Monte Carlo for modeling spatially homogeneous multi-component aerosols
(University of Missouri--Columbia, 2018)Nuclear aerosols generated under normal operational and post-accident reactor environments are of particular importance in estimation of the nuclear source term. Several light water reactor aerosol containment experiments ... -
Generation of graphite particles by abrasion and their characterization
(University of Missouri--Columbia, 2015)Characterization of graphite particles (dust) produced by abrasion that would occur in an operating pebble bed reactor is of interest for reasons of safety, operation, and maintenance. To better understand this abrasion ... -
Measurements of fission product sorption on graphite
(University of Missouri--Columbia, 2017)Nuclear source estimations for high and very high gas temperature reactors (VHTRs) require data for fission product (FP) adsorption on graphite at high temperatures. The adsorption and vapor pressures of silver on nuclear ... -
Mesh-free modeling of spatially inhomogeneous aerosols in arbitrary geometries
(University of Missouri--Columbia, 2018)Many issues affect the nuclear source term, one of which is the existence of aerosols. These aerosols are usually simulated with the assumption that they are spatially homogeneous. Making this assumption reduces complexity ... -
Robust and efficient process for acceptance testing of radiation therapy machines
(University of Missouri--Columbia, 2015)The current (legacy) paradigm for acceptance testing (AT), commissioning, and ongoing quality assurance (QA) and quality control (QC) of linac and treatment planning systems (TPS) is extremely inefficient requiring substantial ... -
Scintillating fiber arrays for in-vivo real-time patient quality assurance for medical linear accelerators
(University of Missouri--Columbia, 2017)The purpose of this research is to design real-time, in-vivo, transmission scintillating fiber detectors capable of identifying errors in external beam radiation therapy when a fraction of a treatment has been delivered. ... -
Sensitivity of plan re-optimizaton to errors in deformable image registration in online adaptive image-guided radiation therapy
(University of Missouri--Columbia, 2016)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Online adaptive image-guided radiation therapy has been a longstanding topic of interest in the field of radiation oncology due to its unique ability ... -
Simulating Cherenkov radiation generated by radiotherapy beams
(University of Missouri--Columbia, 2017)Cherenkov radiation has had various applications in high-energy physics since its discovery, and this research explores two applications of Cherenkov radiation relating to its presence in media under irradiation by medical ... -
Simulation of multiple-component charged aerosol evolution
(University of Missouri--Columbia, 2019)The study of the nuclear source term requires the computation of aerosol dynamics. Solutions to the aerosol general dynamic equation (GDE) are difficult to obtain by analytical or numerical methods when more realistic ... -
Solutions of some transport problems in molecular and phonon transport
(University of Missouri--Columbia, 2012)Nuclear reactor fuel undergoes vast changes during its lifetime. The fuel generates heat energy while simultaneously suffering neutron bombardments and swelling/rupture due to fission product/gas migration, aggregation and ... -
State-based simulations of tumor response to radiotherapy
(University of Missouri--Columbia, 2012)A tumor is comprised of biologically different subdivisions and microenvironmental factors affect the treatment response to radiation therapy (RT). In this work, a state-based tumor response model was developed based on ... -
Synthesis and evaluation of radioactive gold nanoparticles for cancer treatment and imaging
(University of Missouri--Columbia, 2015)This research study explores an appropriate method for production of radioactive gold nanoparticles that may be more appropriate for treating cancer. The first protocol includes using a nontoxic and antitumor phytochemical ... -
Validation of radiation treatment planning with a pseudo-CT derived from MR images
(University of Missouri--Columbia, 2015)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Historically CT has been the necessary for radiation therapy dose calculation due to its inherent density information. However there is increased ... -
Volumetric modulated arc therapy (VMAT) : advanced delivery techniques for static and moving targets
(University of Missouri--Columbia, 2012)Volumetric Modulated Arc Therapy (VMAT) is a rotational radiation therapy which has been used to treat various cancer sites. The continuous delivery of a specific treatment plan for arc therapy can be achieved with multiple ...