Search Constraints

Start Over
Filtering by: Conference section Technology-based user services Remove constraint Conference section: Technology-based user services License All rights reserved Remove constraint License: All rights reserved Subject Radiation dosimetry Remove constraint Subject: Radiation dosimetry

Search Results

  • SSPM-based optical fiber radiation dosimeter

    Creator:
    Konnoff, Daniel C.
    Abstract:
    Current state-of-the-art environmental, clinical, and in-vivo radiation sensing systems utilizing various inorganic and tissue-equivalent plastic scintillators are not user friendly, suffer from electron-beam-generated noise, and are difficult to deploy successfully for real-time dosimetry. A robust, real-time detection system using different scintillating materials coupled to solid-state detectors by optical fibers is...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Radiation Health Physics presented on March 23, 2012. Title: SSPM-Based

  • Relative effective dose risk based on medical diagnostic modalities at the Nebraska Medical Center

    Creator:
    Petrocchi, Michael D.
    Abstract:
    The use of medical diagnostic imaging involving ionizing radiation has drastically increased in recent years causing concern about possible long term consequences such as the induction of cancer. Recognizing this recent trend, the Institutional Review Board (IRB) at the Nebraska Medical Center commissioned this study in order to determine effective...
    Resource Type:
    Masters Thesis
    Full Text:
    presented on June 7, 2010. Title: Relative Effective Dose Risk Based on Medical Diagnostic Modalities at

  • Dosimetric verification of respiratory gated radiation therapy for tumors involving the lung

    Creator:
    Webb, Lindsey S.
    Abstract:
    As the field of radiation therapy evolves new treatment techniques will be established. An example of an evolving treatment technique is respiratory gated radiation therapy (RGRT). Research and studies have shown that RGRT can be used to account for tumor motion as a result of respiratory motion. With evolving technology...
    Resource Type:
    Masters Thesis
    Full Text:
    respiratory motion. With evolving technology and advanced treatment techniques comes complexity, as is the

  • Human Eye Dosimetry: Air Gap Analysis by Shield Placement and Photon Energy

    Creator:
    Herrera, Joshua P.
    Abstract:
    When the ICRP updated their recommended limits for eye dose, they ignited a renewed interest in eye dosimetry. Especially, how the updated eye dose estimates affect current regulations and what that would mean to a radiation worker. Radiation workers are commonly required to wear leaded eyeglasses to reduce their dose...
    Resource Type:
    Masters Thesis
    Full Text:
    . Stationary shields were designed to mimic a user wearing eyeglasses, and dynamic shields were placed in

  • Retrospective thermal neutron fluence determination using lithium-ion mobile telephone batteries

    Creator:
    Dorrell, Nick J.
    Abstract:
    Fortuitous dosimeters are radiosensitive objects carried by an individual who was exposed to radiation. These objects can be analyzed some time after exposure and the results can be used to aid in calculating radiation fields and doses received by individuals. Items that make good fortuitous dosimeters are those that are...
    Resource Type:
    Masters Thesis
    Full Text:
    are estimated based upon the activation products formed in batteries during exposure. In the past

  • Comparison of eye plaque dosimetry using deterministic and Monte Carlo methods

    Creator:
    Bristol, Jonathan R.
    Abstract:
    Eye plaque brachytherapy is an established technique for the treatment of ocular melanoma that allows for the preservation of the affected eye as well as visual function. A common treatment planning system for eye plaque procedures, Plaque Simulator (PS), assists physicists in calculating the radiation dose to the tumor and...
    Resource Type:
    Masters Thesis
    Full Text:
    to the MCNP package with the release of version 5 of MCNP. This software has a windows based user

  • Beta-particle backscatter factors and energy-absorption scaling factors for use with dose-point kernels

    Creator:
    Mangini, Colby D.
    Abstract:
    'Hot particle' skin dosimetry calculations are commonly performed using homogeneous dose-point kernels (DPK) in conjunction with scaling and backscatter models to account for non-homogeneous geometries. A new scaling model for determining the actual DPK for beta-particles transmitted by a high-Z source material has been developed. The model is based on...
    Resource Type:
    Dissertation
    Full Text:
    source material has been developed. The model is based on a determination of the amount of mono

  • Improvements in the dosimetric models of selected benthic organisms

    Creator:
    Caffrey, Emily Amanda
    Abstract:
    The International Commission on Radiological Protection (ICRP) has modeled twelve reference animal and plant (RAP) species using simple geometric shapes in Monte–Carlo (MCNP) based simulations. The focus has now shifted to creating voxel phantoms of each RAP to advance the understanding of radiation interactions in nonhuman biota. The work contained...
    Resource Type:
    Masters Thesis
    Full Text:
    simple geometric shapes in Monte–Carlo (MCNP) based simulations. The focus has now shifted to creating

  • A beta dosimeter and spectrometer utilizing plastic scintillators and a large-area avalanche photodiode

    Creator:
    Kriss, Aaron A.
    Abstract:
    The purpose of this research was to develop and test a radiation detector to perform beta dosimetry and spectroscopy. The detector utilizes plastic scintillator volumes to produce scintillation light in proportion to the amount of energy deposited in them, and a large-area avalanche photodiode to convert the light to electrical...
    Resource Type:
    Dissertation
    Full Text:
    conjunction with MCNP-based spectral enhancement methods, proved the detector capable of recording beta

  • Radiation dose and risk in interventional neuroradiology

    Creator:
    Magill, Dennise M.
    Abstract:
    BACKGROUND/PURPOSE: Exposure from medical radiation sources are on the rise in the United States. Often the highest potential source of radiation dose to patients and radiology staff occur during interventional radiology procedures performed using fluoroscopy and digital subtraction angiography (DSA) to provide image guidance in minimally invasive surgical procedures. Several...
    Resource Type:
    Masters Thesis
    Full Text:
    equipment based monitors with audible alarms. Interventional patient radiation dose monitoring has not