Evaluation of 133Xe for x-ray fluorescence analysis of cadmium in vivo: a Monte Carlo study.
A Monte Carlo model has been developed to support the design of a 180 degrees geometry x-ray fluorescence system for the measurement of cadmium concentration in deep body organs such as the kidney. 133Xe was investigated as the excitation photon source. A total number of 15 x 10(6) simulated incident photons were used. Monte Carlo simulations were performed using the EGS4 Monte Carlo code system. The results showed that for distances between the skin and the kidney surface of 30-60 mm, respectively, cadmium concentrations of 15-60 micrograms/g kidney tissue could easily be detected. The mean skin and kidney doses during such measurements were estimated to be between 8 and 0.9 mGy, respectively.
Department of Physics, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Kingdom of Saudi Arabia. alghorabie@hotmail.com
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al-Ghorabie
D002104:Cadmium / Q000032:analysis*; D004305:Dose-Response Relationship, Drug; D004307:Dose-Response Relationship, Radiation; D006801:Humans; D007668:Kidney / Q000528:radiation effects; D008962:Models, Theoretical; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D014965:X-Rays; D014980:Xenon Radioisotopes
D014980:Xenon Radioisotopes; D002104:Cadmium