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Compartmental modeling for blood flow quantification from dynamic O-water PET images of humans: a systematic review.
Ann Nucl Med
January 2025
Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland.
Dynamic positron emission tomography (PET) can be used to non-invasively estimate the blood flow of different organs via compartmental modeling. Out of different PET tracers, water labeled with the radioactive O isotope of oxygen (half-life of 2.04 min) is freely diffusable, and therefore, very well-suited for blood flow quantification.
View Article and Find Full Text PDFPublic exposure from inhalation of radon and thoron around the tin mine and smelter areas in Bangka, Indonesia.
Sci Rep
December 2024
Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, 036-8564, Aomori, Japan.
Radon (Rn) and thoron (Rn) were reported as the highest contributors to natural radiation received by humans. Furthermore, radon has been stated as the second-highest cause of lung cancer. The concentrations of U and Th (the parent nuclide of radon and thoron, respectively) in nature vary with geological conditions and can be enhanced by human activities.
View Article and Find Full Text PDFStructure shielding of school and gymnasium buildings against fallout gamma radiation from the Fukushima Daiichi Nuclear Power Plant accident.
Ecotoxicol Environ Saf
December 2024
Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Honcho, Hirosaki, Aomori 036-8564, Japan.
The radiation dose reduction factor represents a building's shielding capability against radiation in scenarios of potential nuclear accidents. Notably, the radiation dose reduction for school buildings and gymnasiums have not yet been determined, even though the building types are planned to be used as evaluation shelters in Japan. This study evaluated dose reduction factors in relation to the accident at the Fukushima Daiichi Nuclear Power Plant (FDNPP).
View Article and Find Full Text PDFRetraction Note: Extremely efficient aerogels of graphene oxide/graphene oxide nanoribbons/sodium alginate for uranium removal from wastewater solution.
Sci Rep
November 2024
Department of Medical Laboratory Sciences, College of Applied Medical Sciences, University of Bisha, 255, 67714, Bisha, Saudi Arabia.
Correction factors for induced radioactivity: comparing simplified continuous and periodic irradiation scenarios in medical cyclotron decommissioning.
Radiat Prot Dosimetry
September 2024
Institute of Nuclear Engineering and Science, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan, R.O.C.
The use of a Monte Carlo code in the assessment of residual radioactivity for decommissioning of a medical cyclotron facility requires a reasonable approximation to the facility's history of operations. A periodic irradiation scenario simulating the cyclotron's daily operation for radioisotope production is generally considered reasonable, but its implementation in the code's input file can be cumbersome because more than thousands of irradiation cycles must be modeled. In practice, two simplified scenarios with continuous irradiation are commonly used instead: (i) omitting the downtime between two irradiation periods and (ii) extending the irradiation duration across the entire operational lifespan of the facility, albeit with a reduced beam current to maintain workload consistency.
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