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Report No.

SPECT imaging of mice with $$^{99m}$$Tc-radiopharmaceuticals obtained from $$^{99}$$Mo produced by $$^{100}$$Mo(n,2n)$$^{99}$$Mo and fission of $$^{235}$$U

Hashimoto, Kazuyuki; Nagai, Yasuki; Kawabata, Masako; Sato, Nozomi*; Hatsukawa, Yuichi; Saeki, Hideya; Motoishi, Shoji*; Ota, Masayuki; Konno, Chikara; Ochiai, Kentaro; Kawauchi, Yukimasa; Ota, Akio; Shiina, Takayuki; Takeuchi, Nobuhiro; Ashino, Hiroki; Nakahara, Yuto*

The distribution of $$^{99m}$$Tc-radiopharmaceutical in mouse was obtained with SPECT for the first time using $$^{99m}$$Tc, which was separated by thermochromatography from $$^{99}$$Mo produced via the $$^{100}$$Mo(n,2n)$$^{99}$$Mo reaction with accelerator neutrons. The SPECT image was comparable with that obtained from a fission product $$^{99}$$Mo. Radionuclidic purity and radiochemical purity of the separated $$^{99m}$$Tc and its aluminum concentration met the United States Pharmacopeia regulatory requirements for $$^{99m}$$Tc from the fission product $$^{99}$$Mo. These results provide important evidence that $$^{99m}$$Tc radiopharmaceutical formulated using the $$(n,2n)$$ $$^{99}$$Mo can be a promising substitute for the fission product $$^{99}$$Mo. A current and forthcoming problem to ensure a reliable and constant supply of $$^{99}$$Mo in Japan can be partially mitigated.



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Category:Physics, Multidisciplinary



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