Jae Yong Choi1, Chul Hyoung Lyoo2, Jae Hoon Lee1, Hanna Cho2, Kyeong Min Kim3, Jin Su Kim3, Young Hoon Ryu4. 1. Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea. 2. Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea. 3. Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea. 4. Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea. ryuyh@yuhs.ac.
Abstract
PURPOSE: [(18)F]AV-1451 is a positron emission tomography (PET) radioligand for detecting paired helical filament tau. Our aim was to estimate the radiation dose of [(18)F]AV-1451 in humans. PROCEDURES: Whole-body PET scans were acquired for six healthy volunteers (three male, three female) for 128 min after injection of [(18)F]AV-1451 (268 ± 31 MBq). Radiation doses were estimated using the OLINDA/EXM software. RESULTS: The estimated organ doses ranged from 7.81 to 81.2 μSv/MBq. The critical organ for radiation burden was the liver. Radiation doses to the reproductive and blood-forming organs were 14.15, 8.43, and 18.35 μSv/MBq for the ovaries, testes, and red marrow, respectively. The mean effective dose was 22.47 ± 3.59 μSv/MBq. CONCLUSIONS: A standard single injection of 185 MBq (5 mCi) results in an effective dose of 4.7 mSv in a healthy subject. Therefore, [(18)F]AV-1451 could be used in multiple PET scans of the same subject per year.
PURPOSE: [(18)F]AV-1451 is a positron emission tomography (PET) radioligand for detecting paired helical filament tau. Our aim was to estimate the radiation dose of [(18)F]AV-1451 in humans. PROCEDURES: Whole-body PET scans were acquired for six healthy volunteers (three male, three female) for 128 min after injection of [(18)F]AV-1451 (268 ± 31 MBq). Radiation doses were estimated using the OLINDA/EXM software. RESULTS: The estimated organ doses ranged from 7.81 to 81.2 μSv/MBq. The critical organ for radiation burden was the liver. Radiation doses to the reproductive and blood-forming organs were 14.15, 8.43, and 18.35 μSv/MBq for the ovaries, testes, and red marrow, respectively. The mean effective dose was 22.47 ± 3.59 μSv/MBq. CONCLUSIONS: A standard single injection of 185 MBq (5 mCi) results in an effective dose of 4.7 mSv in a healthy subject. Therefore, [(18)F]AV-1451 could be used in multiple PET scans of the same subject per year.
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