Browsing by Subject "Physics, Radiation"
Now showing items 1-8 of 8
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Characterizations and Diagnostics of Compton Light Source
(2009)The High Intensity Gamma-ray Source (HIGS) at Duke University is a world class Compton light source facility. At the HIGS, a Free-Electron Laser (FEL) beam is Compton scattered with an electron beam in the Duke storage ring ... -
Clinical Implementation of a Real-Time Electromagnetic Localization System: Accuracy, Motion and Margin Analysis for IMRT and IMAT Treatments
(2010)Accurate delivery of external beam radiation therapy relies on localization of the treatment target. For this work, the accuracy of an electromagnetic localization system (ELS) was first verified. Next, prostate deformations ... -
CONE BEAM COMPUTED TOMOGRAPHY (CBCT) DOSIMETRY: MEASUREMENTS AND MONTE CARLO SIMULATIONS
(2010)Cone beam computed tomography (CBCT) is a 3D x-ray imaging technique in which the x-ray beam is transmitted to an object with wide beam geometry producing a 2D image per projection. Due to its faster image acquisition time, ... -
Development of a System for Real-Time Measurements of Metabolite Transport in Plants Using Short-Lived Positron-Emitting Radiotracers
(2008-07-29)Over the past 200 years, the Earth's atmospheric carbon dioxide (CO2) concentration has increased by more than 35%, and climate experts predict that CO2 levels may double by the end of this century. Understanding the mechanisms ... -
Development of Radiochromic Film for Spatially Quantitative Dosimetric Analysis of Indirect Ionizing Radiation Fields
(2010)Traditional dosimetric devices are inherently point dose dosimeters (PDDs) and can only measure the magnitude of the radiation exposure; hence, they are one-dimensional (1D). To measure the magnitude and spatial location ... -
Evaluation of Volumetric Losses During Radiation Therapy Using Image Guidance of Electronic Portal Imaging Device
(2010)<bold>Purpose:</bold> Changes in patient volume, due to tumor shrinkage, dehydration, dysphagia and atrophy, could present issues in the accuracy of dosimetry throughout the course of treatment. The aim of this work is to ... -
High Resolution X-ray Microscopy Using Digital Subtraction Angiography for Small Animal Functional Imaging
(2008-08-04)Research using mice and rats has gained interest because they are robust test beds for clinical drug development and are used to elucidate disease etiologies. Blood vessel visualization and blood flow measurements are important ... -
Practical Considerations with the Clinical Implementation of TG-18 Guidelines
(2010)Quality control of soft-copy displays is critical to ensure the proper contrast rendition of medical images. The American Association of Physicists in Medicine's (AAPM) Task Group 18 (TG-18) has developed a set of testing ...
