18F-FDG PET/CT显像正常腹部消化器官的标准摄取值分析

目的分析^18F-脱氧葡萄糖（FDG）PET/CT显像正常腹部消化器官标准摄取值（SUV）的变化范围.方法60例要求行PET/CT检查的健康人,按体重7.77 MBq/kg静脉注射^18F-FDG,PET采集为三维模式,每个床位3 min.对腹部肝、胆囊、脾、胰腺、胃、盲肠、结肠和直肠进行半定量分析,各器官的SUV由横断面测量,准确定位时参考同机CT.结果正常腹部消化器官^18F-FDG摄取有较大差异,其中摄取较高者SUV平均值（SUVavg）依次为直肠、肝、乙状结肠、回盲部和脾、升结肠,SUV最大值（SUVmax）依次为直肠、乙状结肠、肝、回盲部、升结肠、脾.结论PET/CT显像能较好地识别腹部消化器官;熟悉正常腹部消化器官^18F-FDG摄取的差异,对判读图像十分重要.

SUV effect of normal abdominal digestive organs in 18 F-FDG PET/CT imaging

Objective To analyze the range of standardized uptake values (SUV) of abdominal di- gestive organs in ~(18)F-fluorodeoxyglucose (FDG) PET/CT imaging of healthy persons.Methods Sixty healthy persons were included.After intravenous injection of 7.77 MBq/kg of ~(18)F-FDG,the PET/CT ima- ging was performed for 3 min/bed position on a Siemens Biograph Sensation 16 HR PET/CT scanner.The SUV of various abdominal organs including liver,gall bladder,spleen,pancreas,stomach,cecum,colon and rectum were obtained from transversal views.And the precise location referred to the plain CT.Results There was great variation in ~(18)F-FDG uptake of 8 various organs among which the average SUV (SUV_(avg)) was highest in rectum,then in order of liver,sigmoid colon,ileocecum,spleen,and ascending colon, whereas the maximum SUV (SUV_(max)) was highest also in rectum and then in order of sigmoid colon,liver, ileocecum,ascending colon,and spleen.Conclusions PET/CT can well recognize different abdominal di- gestive organs.Well understanding the normal variation of ~(18)F-FDG uptake in normal ahdominal organs is important for proper interpretation of PET/CT imaging.