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Radiation dose rate assessment around patients in PET/CT units

Radiation dose rate assessment around patients in PET/CT units
M.M. Emad El-din; R.M.M. Mahmoud; Ibrahim Eid; M.R. Ezz El-din; R.A. Rizk
International Journal of Nuclear Energy Science and Technology, Vol. 12, No. 1 (2018) pp. 32 - 44
The objective of this paper is to assess the radiation exposure resulting from radioactive patients injected with different activities of 2-[<SUP align="right">18</SUP>F] fluoro-2-deoxy-D-glucose (<SUP align="right">18</SUP>F-FDG) in Positron Emission Tomography/Computed Tomography (PET/CT) units. This objective is fulfilled by measuring the dose rates practically inside and outside PET/CT rooms around radioactive patients using a calibrated survey meter. Afterwards, the dose rates are estimated mathematically using Monte Carlo simulation model. The results show that the dose rates on patient's body surface decrease greatly with distance and it is recommended for PET/CT staff to stand at distances more than 1.5 m from radioactive patients if possible during direct contact. Also, it is found that the shielding thickness in the selected room dimensions is adequate and effective for the γ-radiation arising from radioactive patients. The practically measured dose rates around radioactive patients are quite similar to mathematically predicted results and slight differences may be attributed to the difference between the estimated <SUP align="right">18</SUP>F biological half life time and real biological half life time due different biological uptake or excretion time from one patient to another.

Authors:   M.M. Emad El-din; R.M.M. Mahmoud; Ibrahim Eid; M.R. Ezz El-din; R.A. Rizk
Journal:   International Journal of Nuclear Energy Science and Technology
Volume:   12
edition:   1
Year:   2018
Pages:   32
DOI:   10.1504/IJNEST.2018.092597
Publication date:   26-Jun-2018
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