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肿瘤的诊断、鉴别诊断、疗效评价和预后判断一直是临床医学亟待解决的问题,传统的以解剖结构改变为基础的显像方法如B超、CT及 MR有其自身的局限性,因此寻找一种以分子代谢功能改变为基础的显像方法成为临床肿瘤学研究的新趋势。近年来核医学符合探测正电子成像应用于肿瘤具有其独特优势,尤其氟(18F)标记的氟化脱氧葡萄糖(18F-fluorodeoxyglucose, 18F-F D G)正电子发射计算机断层显像 (positron emission tomography,PET)临床应用价值已得到充分肯定,其在消化道肿瘤的应用研究日趋增加。
Tumor diagnosis, differential diagnosis, curative effect evaluation and prognosis have always been the urgent problems to be solved in clinical medicine. Traditional imaging methods based on anatomical changes such as B-mode ultrasound, CT and MR have their own limitations. Therefore, Imaging methods based on changes in molecular metabolism have become the new trend of clinical oncology. In recent years, nuclear medicine has the unique advantages that the detection of positron emission tomography (PET) with PET (18F-labeled fluorodeoxyglucose, 18F-FDG) positron emission tomography ) Clinical value has been fully affirmed, its application in gastrointestinal cancer research increasing.