A5044409611- Radiation Dose and Imaging
- Radiation Detection and Scintillator Technologies
- Graphite, nuclear technology, radiation studies
- Advanced Radiotherapy Techniques
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Radiation Therapy and Dosimetry
- Advanced Measurement and Metrology Techniques
- Radiation Effects and Dosimetry
- Luminescence Properties of Advanced Materials
- Advanced Surface Polishing Techniques
- Effects of Radiation Exposure
- Nuclear and radioactivity studies
- Laser Material Processing Techniques
- Radioactive contamination and transfer
- Big Data and Business Intelligence
- Advances in Oncology and Radiotherapy
- Occupational and environmental lung diseases
- Surface Roughness and Optical Measurements
- Carcinogens and Genotoxicity Assessment
- Optical measurement and interference techniques
- Advanced X-ray and CT Imaging
- Chemical Safety and Risk Management
- Risk and Safety Analysis
- Information Systems Theories and Implementation
Landauer (United States)
1992-2021
National Institutes of Health
2018
National Cancer Institute
2018
Institut de Radioprotection et de Sûreté Nucléaire
2018
Siena College
2009
Vanderbilt-Ingram Cancer Center
2006
Johnson & Johnson (United States)
2006
Vanderbilt University
2006
Martin Marietta Materials (United States)
1985-1995
Lawrence Livermore National Laboratory
1992
A health survey of more than 143,000 radiologic technologists is described. The population was identified from the 1982 computerized files American Registry Radiologic Technologists, which established in 1926. Inactive members were traced to obtain current addresses or death notifications. More 6000 reported have died. For all registrants who alive when located, a detailed 16-page questionnaire sent, covering occupational histories, medical conditions, and other personal lifestyle...
In this article, we describe recent methodological enhancements and findings from the dose reconstruction component of a study health risks among U.S. radiologic technologists. An earlier version dosimetry published in 2006 used physical statistical models, literature-reported exposure measurements for years before 1960, archival personnel monitoring badge data cohort members through 1984. The models previously described were to estimate annual occupational radiation doses 90,000...
Estimates of radiation risks following prolonged exposures at low doses and low-dose rates are uncertain. Medical workers a major component the Million Person Study (MPS) health effects. Annual personal dose equivalents, HP(10), for individual available to facilitate dose-response analyses lung cancer, leukemia, ischemic heart disease (IHD) other causes death.The Landauer, Inc. dosimetry database identified 109,019 medical associated first monitored 1965-1994. Vital status cause death were...
Epidemiologic studies of radiation-exposed populations form the basis for human safety standards. They also help shape public health policy and evidence-based practices by identifying quantifying risks exposure in defined populations. For more than a century, epidemiologists have studied consequences radiation exposures, yet effects low levels delivered at low-dose rate remain equivocal.
Background The aim of the Million Person Study Low-Dose Health Effects (MPS) is to examine level radiation risk for chronic exposures received gradually over time and not acutely as was case Japanese atomic bomb survivors. Nuclear power plant (NPP) workers comprise nearly 15 percent MPS. Leukemia, selected cancers, Parkinson's disease, ischemic heart disease (IHD) other causes death are evaluated.Methods material U.S. Regulatory Commission's Radiation Exposure Information Reporting System...
Data have been collected and physical statistical models constructed to estimate unknown occupational radiation doses among 90,000 members of the U.S. Radiologic Technologists cohort who responded a baseline questionnaire during mid-1980s. Since availability dose data differed by calendar period, different were developed applied for years worked before 1960, 1960- 1976 1977-1984. The estimation used available film-badge measurements (approximately 350,000) individual members, information...
Incomplete radiation exposure histories, inadequate treatment of internally deposited radionuclides, and failure to account for neutron exposures can be important uncertainties in epidemiologic studies workers. Organ-specific doses from lifetime occupational radionuclide intakes were estimated an study 5,801 Rocketdyne/Atomics International (AI) workers engaged nuclear technologies between 1948 1999. The entire workforce 46,970 Rocketdyne/AI employees was identified 35,042 Kardex work...
A completely optical, non-destructive imaging of tracks in a fluorescent crystal provides new way to detect and assess doses from heavy charged particles neutrons. The technique combines confocal microscopy with radiation-sensitive, luminescent material based on aluminium oxide single crystals doped carbon, magnesium having aggregate oxygen vacancy defects (Al2O3:C,Mg). Radiation-induced colour centres the have an absorption band at 620 nm produce fluorescence 750 high quantum yield short,...
Background The reconstruction of lifetime radiation doses for medical workers presents special challenges not commonly encountered the other worker cohorts comprising Million Worker Study.Methods selection approximately 175,000 relies on using estimates and annual personal monitoring results collected since 1977. Approaches have been created to adjust so that mean organ absorbed can be estimated.Results Changes in technology practices altered exposure environments which a may exposed during...
Purpose To summarize occupational badge doses recorded for a sample of U.S. nuclear medicine technologists. Materials and Methods Nine large medical institutions identified 208 former current technologists certified after 1979 linked these individuals to historic dose records maintained by commercial dosimetry company (Landauer), yielding total 2618 annual records. The distributions cumulative were described using summary statistics. Results Between 1992 2015, the median personal equivalent...
High sensitivity dosemeters based on Al2O3:C have been prepared and tested for use as beta using optically stimulated luminescence (OSL). Two types of sample were tested, namely unpolished thick, single crystal chips thin powder layers aluminium substrates. The samples used in two OSL readout modes: (a) cw-OSL a tungsten lamp, (b) pulsed-OSL Nd:YAG laser. Comparisons made with TL properties, where possible. irradiated variety sources, including 147Pm, 204Tl, 90Sr-90Y 60Co, under cover...
We present a simple and general method of aspheric figure metrology using CGH null mounted in the test beam conventional Fizeau or Twyman-Green interferometer. A 'standard' reflective is used to establish optical alignment with respect interferometer's spherical beam. This then mechanically trnaferred custom null. The accuaracy transfer readily verified. has been modeled by raytracing verified experimentally testing perforated 8 inch F/1.5 on-axis paraboloid 50 mm off-axis from their centers...
In order to conduct valid epidemiological studies of nuclear power plant workers, good information on the workers' radiation dose histories is essential. Dose records held by a major dosimetry service company and Nuclear Regulatory Commission's Radiation Exposure Information Recording System have been compared for sample 99 workers. About half workers in had no System, since they not terminated employment at Commission-licensed facility; accordingly, their career doses (as recorded company)...
This work investigates the applicability of using data from personal monitoring dosimeters to assess photon energies which medical workers were exposed. Such determinations would be important for retrospective assessments organ doses used in occupational radiation epidemiology studies, particularly absence history or other information regarding energy source. Monthly dose equivalents and filter ratios under two different metallic filters contained Luxel+