Browsing Graduate Theses and Dissertations - Health Physics by Creation Date
Now showing items 1-20 of 23
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Assessing Leakage Workloads of Medical Linear Accelerators for IMRT and TBI Techniques
(2007-12-10)Current estimates for leakage workloads are not well quantified for Intensity Modulated Radiation Therapy (IMRT) and Total Body Irradiation (TBI) treatments. When analyzed on a large scale, using a large sample, a well ... -
Phototransfer thermoluminescence applied to the re-estimation of low dose levels of ionizing radiation for personnel dosimetry
(Georgetown University, 2010) -
Vector Representation as a Tool for Detecting Characteristic Uranium Peaks
(Georgetown University, 2012)Vector representation is found as a viable tool for identifying the presence of and determining the difference between enriched and naturally occurring uranium. This was accomplished through the isolation of two regions ... -
Beta Radiation Response of SIRAD® Colorimetric Dosimeter vs. Theoretical Calculation of Beta Dose in the 5 to 25 rad Range
(Georgetown University, 2012)<bold>ABSTRACT -
Determining the Isotopic Concentration of Uranium from Vector Representation of the Gamma Spectrum
(Georgetown University, 2014)DETERMINING THE ISOTOPIC CONCENTRATION OF URANIUM FROM VECTOR REPRESENTATION OF THE GAMMA SPECTRUM -
Establishing an Effective Dose Equivalent Monitoring Program for a Commercial Nuclear Power Station
(Georgetown University, 2014)ESTABLISHING AN EFFECTIVE DOSE EQUIVALENT MONITORING PROGRAM -
Organ Dose Conversion Coefficients for Pediatric Reference Computational Phantoms in External Photon Radiation Fields
(Georgetown University, 2015)In the event of a radiological accident or attack, it is important to estimate the organ doses to those exposed. In general, it is difficult to measure organ dose directly in the field and therefore dose conversion ... -
Characterizing Dose Rate Variability of a Mark I Cesium-137 Irradiator
(Georgetown University, 2015)The Mark I irradiator is commonly used by institutions of higher learning and other facilities to administer a given radiation dose to numerous materials. Growing concern regarding highly variable mouse survival data ... -
The Radiosensitizing Potential of Rigosertib and Dinaciclib in Ewing's Sarcoma Cells
(Georgetown University, 2015)Ewing’s sarcoma is the second most frequent bone cancer. However, it is still a relatively uncommon cancer, with only approximately 225 new cases diagnosed in patients under 20 years old each year in North America. Despite ... -
PATIENT DOSE REDUCTION IN COMPUTED TOMOGRAPHY AT MEDSTAR GEORGETOWN UNIVERSITY HOSPITAL: OPTIMIZATION OF ABDOMINAL ADULT PROTOCOL AND TRAINING OF REFERRING PHYSICIANS
(Georgetown University, 2017)Dose reduction in computed tomography (CT) has two components, elimination of unnecessary scans and optimization of justified exams. Several scientific articles have been published addressing issues and techniques for ... -
Characterization of a Commercial Optically Stimulated Luminescence Dosimetry System
(Georgetown University, 2017)There is a need to better understand the risks of low level radiation dose in medical diagnostic procedures and ensure that dose measurements are accurate and traceable to National Standards. Users of instruments typically ... -
Development of Eye Dosimeter Using Additive Manufacturing Techniques to Monitor Occupational Eye Lens Exposures to Interventional Radiologists
(Georgetown University, 2017)In this project, an eye dosimeter was designed for monitoring occupational lens of the eye exposures targeted to interventional radiologists who are often indirectly exposed to scattered radiation from the patient while ... -
An Assessment of Common Approaches to Estimating Peak Skin Dose Rresulting from Fluoroscopically Guided Interventions
(Georgetown University, 2017)Fluoroscopy guided procedures are increasing in complexity, and with that, Peak Skin Doses (PSD) that produce cutaneous radiation injury are a growing concern. Direct measurement of PSD is possible, but the decision to do ... -
Evaluating Eye Lens Dose for Interventional Radiologists Using Optically Stimulated Luminescence Dosimetry in a Clinical Environment
(Georgetown University, 2018)The International Commission on Radiological Protection (ICRP) and the National Council on Radiation Protection and Measurements (NCRP) have made recommendations to reduce the dose limit for the lens of the eye as a result ... -
The Detectability and Survivability of Histone Modifications Induced by Low-Dose Ionizing Radiation
(Georgetown University, 2019)The increasing likelihood of accidental or unplanned radiation exposure, where physical -
Common Table Salt Used as a Retrospective Dosimeter Using Thermoluminescence
(Georgetown University, 2019)In this study, the feasibility of using common table salt as a retrospective dosimeter was evaluated using thermoluminescence. In an event of a terrorist act in which radioactive material is used in a dispersal device, ... -
Assessing RadTriage Colorimetric Dosimeter Response to Low-Dose Gamma-Ray Exposure
(Georgetown University, 2019)There is a need for instantly indicating, easy-to-read, and relatively inexpensive ionizing radiation casualty dosimeters for first responders and members of the general public. One such dosimeter is the RadTriageTM ... -
Modeling Eye Lens and Its Conversion Coefficients Using MCNP6
(Georgetown University, 2020)Recent studies have found the lens of the human eye to be more radiosensitive than previously thought with a questionable threshold dose for cataractogenesis. Radiation protection protocols and regulations rely on ICRP ... -
Trends in External Radiation Exposure among the U.S Navy Medical Personnel Working in Nuclear Medicine Departments from 2003 to 2020
(Georgetown University, 2021)Objectives: To assess trends in external occupational exposure of nuclear medicine (NM) workers from United States Navy (USN) medical centers from 2003 to 2020 and compare them with previously published data on NM workers ... -
Radiation Dose to the Lens of the Eye in US Navy Medical Workers
(Georgetown University, 2021)In 2012, the International Committee for Radiation Protection (ICRP) published a report recommending a change in the allowable lens dose equivalent from 150 mSv per year to 20 mSv per year averaged over five years not to ...
