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目的 研发一种基于微流控芯片技术的18F微反应器,并将其用于合成18F标记的放射性药物.方法 利用丝印技术和聚二甲基硅氧烷(PDMS)材料制作微流控芯片,再与定制的具有加热或冷却功能的玻璃基微反应瓶组合而形成18F微反应器.利用该微反应器合成18F-FDG和18F-氟乙酸盐(FAC),并测定2种产物的标记率和放化纯.结果 高度集成化18F微反应器的体积为40.0 mm(长)×30.0 mm(宽)×15.0 mm(高),其中PDMS微流控芯片的体积为40.0 mm(长)×30.0 mm(宽)×6,0 mm(高),气/液通道尺寸为0,3 mm(宽)×50.0 μm(高),微反应瓶的体积为200μl,毛细管加热或冷却效果良好,可快速升温或降温.该微反应器实现了18 F-FDG和18F-FAC的放射化学合成,其氟[18F]化反应的标记率分别为92.5％和90.0％,产品放化纯均大于96％.结论 该基于PDMS微流控芯片的18F微反应器具有集成度高、总体积小、标记前体用量少的优点,可用于18F-FDG和18 F-FAC的放射化学合成.“,”Objective To develop a polydimethylsiloxane (PDMS) microfluidic chip-based 18F microreactor for the preparation of 18F-labeled probes.Methods The 18F microreactor was composed of PDMS microfluidic chip and customized glass microvessel integrating with stainless capillary tube (D 0.6 mm) as heater/cooler.PDMS chips were fabricated by silk-screen printing technology,a traditional and easily accessible process.18F-FDG and 18F-fluoroacetate(FAC) were synthesized using the 18F microreactor.TLC was applied to measure the 18F-labeling yield and the radiochemical purity of 18F-FDG and 18F-FAC.Results The size of PDMS chip was 40.0 mm (l)×30.0 mm (w)×6.0 mm(h) and the liquid/gas inside channel was 0.3 mm (w)×50.0 μm (h).The customized glass microvessel was about 4.0 mm (D) ×30.0 mm (h) with 200 μl of reaction volume.The capillary tube which wrapped around the microvessel functioned as a heater when electric current was provided,while as a cooler when compressed air went through.The integrated 18F microreactor with a total size of 40.0 mm (l) ×30.0 mm (w) ×15.0 mm (h) was successfully used to prepare 18F-FDG and 18F-FAC,whose radiochemical purity were both higher than 96％ and 18F-labeling yield was 92.5％ and 90.0％ respectively in the first fluorination step.Conclusions A PDMS microfluidic chip-based 18F microreactor is developed and successfully applied to prepare 18F-FDG and 18F-FAC.It has the dual advantages of both microfluidc chip and traditional synthesis module and features of high integration,small total size and low consumption of labeling precursor.