Conveners
Metrology and Applications
- Alison Bruce (University of Brighton)
Metrology and Applications
- There are no conveners in this block
Metrology and Applications
- Alison Bruce (University of Brighton)
F-18 is an important radionuclide in PET imaging and is produced at iThemba LABS. Therefore, iThemba LABS and other producers and users of F-18 require traceability from a metrology institute. At NMISA the absolute activity of F-18 was determined through a primary measurement using 4πβ-γ liquid scintillation coincidence counting. Conventional beta-efficiency extrapolation was employed....
Background Information and Aims: X-ray imaging is one of the classical human health diagnostic procedures. The aim of this work was to explore and analyze the X-ray exposure parameters and their significance in a given protocol in relation to image quality.
Materials and Methods: Exposures were delivered on meaty cow ribs, which served as a human equivalent phantom with tissue...
Gamma-ray spectrometer with a single HPGe or NaI:Tl detector shielded with lead is often used to measure the activity concentration of radionuclides in soil samples. A passive water shield to reduce background radiation reaching the detectors was designed using GEANT4 Monte Carlo simulations and then constructed. IAEA-375 soil and beach sand each placed in Marinelli beaker were measured for 48...
The GEANT4 Monte Carlo simulation toolkit for radiobiology, GEANT4-DNA, developed earlier [Belov et al., 2015; 2017] is to be improved and extended. The stages of DNA double strand break (DSB) repair in mammalian cells will be verified by the reconstruction of the repair time courses of radiation induced foci, which are suited to specific repair processes.
The model shows a possible...
To be completed
To be completed
At iThemba LABS Positron Emission Particle Tracking (PEPT) is used to study dynamic physical processes and multiphase flow phenomena. Studies of these often turbulent systems contribute to understanding of fundamental flow behaviour and are of increasing interest in the current climate of reducing industrial wastes, improving process efficiencies, and developing design lead approaches to...
The dti established agencies that form part of its technical infrastructure (standards, quality assurance and metrology) in order:
- To address market failures through technical regulations in order to
protect the public and the environment and by providing standards and
accreditation to regulators as policy tools. -
To support industrial development through:
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development...
