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Showing 1 to 13 of 13 for “"Radiation beam"”.
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Pattern reconfigurable metamaterial antenna for 5G base station network
Reconfiguration of an antenna’s radiation pattern in a predefined direction is very important for enhancing the performance of communication systems in terms of the quality of service, system security, avoiding interference, and economizing power. Metamaterials, on the other hand, are commonly used …
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Prediction of Breathing Patterns Using Neural Networks
… it has been difficult to synchronize the radiation beam with the tumor position. Many compensation techniques have been used before. But all these techniques have some system latency, up to a few hundred milliseconds. Hence it is necessary to predict tumor position to compensate for the …
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Scalable design of high-performance on-chip Terahertz source and imager
… oscillator array for high-power and collimated radiation beam at mid-THz band. The array is 2D-coupled, and each element achieves these functions: (i) maximize oscillation at fundamental frequency fo= 2 50 GHz; (ii) synchronize phase of fo and its harmonics among elements; (iii) cancel …
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An Exploration of the Feasibility of Combining Radiation Therapy with Psoralen Phototherapy
<p>Radiation therapy (RT) has been a standard-of-care treatment for many localized cancers for decades. Despite being an effective treatment modality for many clinical presentations, the efficacy of RT against cancer can be limited due to local recurrence, metastatic spread, and radiation …
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Characterization of Optically Stimulated Luminescent Detectors In Photon & Proton Beams For Use In Anthropomorphic Phantoms
… and for remote anthropomorphic phantom irradiations. The OSLDs used were aluminum oxide (Al2O3:C) nanoDots from Landauer, Inc. (Glenwood, Ill.) measuring 10x10x2 mm3. A square, 20(L)x20(W)x0.5(H) cm3 piece of solid water was fabricated with pockets to allow OSLDs and TLDs to be irradiated …
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Development of a Breathing Monitor and Training System, And the Analysis of Methods of Training Patients to Regulate their Breathing when Undergoing Radiotherapy for Lung cancer
… Lung Cancer (NSCLC) rely on conforming the radiation dose to the tumour geometry as tightly as possible; this increases the probability of killing the tumour cells while simultaneously reducing the radiation dose to nearby tissues and to organs at risk, subsequently reducing normal tissue …
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Boron neutron capture therapy treatment planning improvements
… hours for scoping calculations of three to five beams and final calculations for two beams, it was targeted for improvement. Three approaches were used to reduce the calculation times. A statistical uncertainty analysis was performed on doses rates and showed that a fewer number of particles …
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Rheological and Mechanical behaviour of Block copolymers, Multigraft copolymers and Block copolymer Nanocomposites
… TPEs are cross-linked in presence of electron beam (EB) radiation for developing materials with superior properties. The electron beam radiation has the ability to alter material parameters at molecular level for enhancing the macroscopic properties. The desirable physical and chemical …
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Volumetric, Magnetic Resonance-Visible, and Radiation-Sensitive Detectors For Magnetic Resonance Image-Guided Radiation Therapy
<h1>VOLUMETRIC, MAGNETIC RESONANCE-VISIBLE, AND RADIATION-SENSITIVE DETECTORS FOR MAGNETIC RESONANCE IMAGE-GUIDED RADIATION THERAPY</h1> <p>Hannah Jungeun Lee</p> <p>Advisory Professor: Geoffrey S. Ibbott, Ph.D.</p> <p>Due to the superior soft-tissue contrast of magnetic resonance imaging (MRI) …
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Monte Carlo Analysis and Physics Characterization of a Novel Nanoparticle Detector for Medical and Micro-dosimetry Applications
<p>The outcomes for both (i) radiation therapy and (ii) preclinical small animal radio- biology studies are dependent on the delivery of a known quantity of radiation to a specific and intentional location. Adverse effects can result from these procedures if the dose to the target is too high or low, …
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Reconfigurable microstrip antennas with tunable radiation pattern characteristics
Reconfigurable beam antenna systems are capable of changing their radiation characteristics in real time, such as beam direction, beam shape, beamwidth, etc. Such antenna system is desired for various wireless applications because of many reasons among them; it helps to enhance signal strength …
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Lighting a building with a single bulb : toward a system for illumination in the 21st c.; or, A centralized illumination system for the efficient decoupling and recovery of lighting related heat
… transport fibers, can be converted into visible radiation at the emitting end of the fiber, supplementing the light output. Fiber optics are used to carry information over long distances (actually encoded pulses of radiative IR), but certain fiber optics can carry tremendous amounts of energy. As …
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Facilitating the Clinical Translation of Flash Radiotherapy Through Dosimetry Development and Beam Parameter Optimization
<p>Advisory Professor: Emil Schüler, PhD</p> <p>Radiation therapy (RT) is a crucial component of curative cancer therapy, with a majority of cancer patients in the United States receiving RT as part of treatment. The goal of RT is to maximize the therapeutic index in curing disease while minimizing …