Index Catalog // Hyrax

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

O Criador:: 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

Locating and Quantifying Contamination Deposited in Radiation Puncture Wounds

O Criador:: Wehmann, Nicholas K.
Abstract:: Internal dosimetry models show a representation of how radionuclides move through the body. This study takes a look at radiation wounds by modelling a puncture wound to the hand using Microshield software. An analysis of these models provides a triangulation method that could be used to investigate wound characteristics, as...
Resource Type:: Masters Thesis

Use of CR-39 for nuclear criticality accident dosimetry and high neutron dose monitoring

O Criador:: Tai, Lydia I.
Abstract:: CR-39 foils were irradiated as part of nuclear accident dosimetry experiments using the Godiva reactor at the Nevada National Security Site and the Caliban and Prospero reactors at the Valduc Centre for Nuclear Studies in France. The irradiated foils were chemically etched using the standard Lawrence Livermore National Laboratory process...
Resource Type:: Masters Thesis

A quantitative comparison of cardiovascular imaging systems with respect to the resolution capabilities and the resulting skin entrance doses operating in both fluoroscopic and cine mode

O Criador:: Helms, W. Scott
Abstract:: The increasing use of medical procedures using ionizing radiation has increased significantly in recent years. In 1987, the National Council on Radiation Protection Report 93 (NCRP) reported that the average exposure ionizing radiation was 53mRem/year (0.53mSv/year). In their most recent study on radiation exposures NCRP Report 160 in 2009, the...
Resource Type:: Masters Thesis

Blood-based gene expression as a biodosimetry model for neuroblastoma patients treated with ¹³¹I-mIBG

O Criador:: Edmondson, David A.
Abstract:: Internal dosimetry is challenging and relies on estimates using MIRD or ICRP biokinetic models. To address this, we looked at gene expression analysis in whole blood from radiotherapy patients. Patients with relapsed or refractory neuroblastoma who received ¹³¹I-mIBG at UCSF were used to correlate internal ionizing radiation (IR) dose with...
Resource Type:: Masters Thesis

Monte Carlo derived absorbed fractions in a voxelized model of a rainbow trout

O Criador:: Hess, Catherine A.
Abstract:: The International Commission on Radiological Protection (ICRP) has modeled twelve reference animals and plants (RAPs) with simple geometric shapes to be used when estimating radiation dose to non-human biota (NHB). In recent years, there has been interest in creating more realistic models in order to better understand the radiation interactions...
Resource Type:: Masters Thesis

Comparison of dosimetric modeling of the International Commission on Radiological Protection trout reference animal

O Criador:: Comolli, Michelle LeAnne
Abstract:: Radiation protection has historically been from a human protection approach, therefore many studies have neglected the potential dose contribution from the gastrointestinal tract (GIT) in animal studies. The International Commission on Radiological Protection (ICRP) utilized simplified geometric shapes with Dose Conversion Factors (DCF) based on homogenized models for the trout...
Resource Type:: Masters Thesis

Site specific reference person parameters and derived concentration standards for the Savannah River site

O Criador:: Stone, Daniel K.
Abstract:: The U.S. Department of Energy (DOE) Order 458.1 states that the compliance with the DOE annual dose limit of 1 mSv (100 mrem) to a member of the public may be demonstrated by calculating dose to the maximally exposed individual (MEI) or to a representative person. Historically, the MEI concept...
Resource Type:: Masters Thesis

Improvements in the dosimetric models of selected benthic organisms

O Criador:: 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

A comparison of deterministic and probabilistic radiation dose assessments at three fictitious ¹³⁷Cs contaminated sites in California, Colorado, and Florida

O Criador:: Brock, Terry A.
Abstract:: Two methods of radiation dose assessment were evaluated for the Cs-137 in soil ⇒ leafy vegetable ⇒ human consumption exposure pathway at three fictitious contaminated sites in California, Colorado, and Florida. An annual dose equation was developed and per USEPA risk assessment guidelines, traditional, single point annual dose estimates were...
Resource Type:: Masters Thesis

Hyrax

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

Locating and Quantifying Contamination Deposited in Radiation Puncture Wounds

Use of CR-39 for nuclear criticality accident dosimetry and high neutron dose monitoring

A quantitative comparison of cardiovascular imaging systems with respect to the resolution capabilities and the resulting skin entrance doses operating in both fluoroscopic and cine mode

Blood-based gene expression as a biodosimetry model for neuroblastoma patients treated with ¹³¹I-mIBG

Monte Carlo derived absorbed fractions in a voxelized model of a rainbow trout

Comparison of dosimetric modeling of the International Commission on Radiological Protection trout reference animal

Site specific reference person parameters and derived concentration standards for the Savannah River site

Improvements in the dosimetric models of selected benthic organisms

A comparison of deterministic and probabilistic radiation dose assessments at three fictitious ¹³⁷Cs contaminated sites in California, Colorado, and Florida

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