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A Nexus in Radiation Dosimetry: Convergence and Divergence in Radiation Protection, Nuclear Medicine, and Nuclear Security
November 23, 2020 @ 4:00 pm - 5:00 pm
In recent decades, the role of computational dosimetry has emerged in support of radiation protection regulation in occupational and medical exposures of workers, members of the public, environmental management, and nuclear medicine patients. Dosimetric approaches in radiation protection and nuclear medicine have evolved hand-in-hand, but have reached a nexus in which there is a convergence and divergence between representative “reference” models (one-size-fits-all) vs. individualized models. In this presentation, we will look at the synergistic evolution of radiation protection and nuclear medicine dosimetry models – both physical and biokinetic – and divergent trends in cross-cutting applications of public radiation protection. We will explore the impacts of these convergent and divergent trends as applied in consequence management following radiological/nuclear accidents and security incidents, including dose assessment of children exposed to fission products during the Fukushima incident, and movements towards individualized nuclear medicine in diagnostic medicine, radiotherapy, and new targeted modalities. Other ongoing activities and opportunities in the Radiological Engineering, Detection, and Dosimetry (RED2) Laboratory at Texas A&M University, led by Dr. Dewji, will be further discussed.
Dr. Shaheen A. Dewji is an Assistant Professor in the Department of Nuclear Engineering at Texas A&M University and a Faculty Fellow of the Center for Nuclear Security Science and Policy Initiatives (NSSPI). In her prior role at Oak Ridge National Laboratory, Dewji was Radiological Scientist in the Center for Radiation Protection Knowledge, where her recent work has included assessment of patient release criteria for nuclear medicine patients, as well as development of dose coefficients associated with the external exposure and internal uptake of radionuclides due to contaminated environmental media. Prior, Dr. Dewji spent five productive years with the Safeguards and Security Technology Group at ORNL as a Nondestructive Assay Systems Engineer, focusing on nuclear material measurement of uranium enrichment, holdup (MUF), and signature analysis. Dr. Dewji completed her Masters and Ph.D. degrees in Nuclear and Radiological Engineering at the Georgia Institute of Technology in Atlanta, GA. As a native of Vancouver, Canada, she received her Bachelor of Science in Physics from the University of British Columbia.