Post-Graduate Fellows

Lotem Buchbinder Shadur, Ph.D.

Dr. Lotem Buchbinder Shadur is a Research Engineer in the RED² Laboratory at Georgia Tech. Her work focuses on expanding biokinetic models and dose reconstruction for internal exposure to radionuclides in humans and animals. In addition, she studies the effect of age, gender, and health condition of the subjects on the biokinetic models influence the model coefficients and the dose uncertainty.  In addition, she is developing biokinetic models to predict the behavior pre/post-administration of newly developed chelation agents by employing new data from collaborations and earlier chelation agents to expand the tools used in the case of internal exposure.

Lotem joined RED² after finishing her Ph.D. from Technion, Israel Institute of Technology. Her Ph.D. focus on retrospective dosimetry using advanced pulsed ESR techniques and teeth enamel, examining radiation-induced paramagnetic defects in the enamel layer of the human tooth using ESR methods and demonstrating the potential for these innovative techniques for developing a retro biodosimetry in vivo device to estimate spin concentration and evaluate dose without prior knowledge of the measured enamel volume. That will allow dose estimation for radiological events requiring such a device. Her background is in chemistry (B.Sc.) and material science engineering (B.Sc. and M.Sc.), where she developed Hybrid Electrochromic Materials in her thesis.

Martin Graffigna

Martin is a Research Engineer in the RED² Laboratory at Georgia Tech. His work focuses on using computational fluid and particle dynamics (CFPD) to model the dose deposited by inhaled radioactive aerosols in order to obtain a simpler reduced-order model applicable to a broad spectrum of individuals to improve Human Respiratory Tract (HRT) transfer coefficients.

Martin graduated as a Nuclear Engineer (i.e. Master of engineering degree equivalent) from the Balseiro Institute, located in Bariloche, Argentina. Previously he has done two years of Chemical Engineering at the University of San Juan (UNSJ), a requirement to be admitted to this undergraduate program.

His undergraduate thesis was titled “Activation calculation methodology by CFD-Monte Carlo Coupling”, performed at INVAP, Argentina’s leading company in Nuclear Reactors design and construction, which proposes a new methodology to accurately compute the level of activation in MTR reflector tank’s refrigeration loop at their outlet for shielding design and dose assessment purposes.