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同位素  2011 

18F-FDG的稳定性及提高稳定性的方法

, PP. 89-93

Keywords: 18F-FDG,辐射分解,稳定性

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Abstract:

本工作研究了常规制备的大剂量、高浓度18F-FDG的稳定性,并在产品中添加稳定剂乙醇或对已部分分解的产品进行再纯化,以提高18F-FDG的放化纯度。结果显示,当18F-FDG产品浓度高于6TBq/L时,放置4h,其放化纯度<95%;浓度大于7.4TBq/L时,添加体积分数为0.1%的乙醇后,能明显降低18F-FDG的分解,6h后放化纯度>95%;已分解的18F-FDG经再纯化后,放化纯度>99%。MicroPET/CT大鼠显像表明,采用已分解的18F-FDG对大鼠进行显像,其股骨有明显摄取;对其进行再纯化处理后对大鼠显像,大鼠股骨无放射性摄取。以上结果表明,高浓度的18F-FDG有效时间小于4h;添加0.1%乙醇可明显减慢高浓度18F-FDG分解,而再纯化方法可以彻底除去分解的放射性杂质。为保证18F-FDG质量,将添加稳定剂和再纯化两种方法联合使用,保证产品放化纯度的同时还可提高18F-FDG的利用率。

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