中文摘要：

[目的]探讨18F-FDGPET／CT在胃部良恶性疾病鉴别诊断中的作用。[方法]回顾性分析49例临床可疑胃部疾病患者行-8F—FDGPET／CT显像的结果。分析病灶分布特点、厚度及标准化摄取值最大值（SUV。）。[结果]胃部良、恶性病灶的厚度分别为（13．800±3．489）mm、（18．088±8．575）aim，差异具有统计学意义（t=2．486，P=O．017）；胃部良、恶性病灶的早期相SUVmax分别为3．607±2．710、7．277＋6．175，差异具有统计学意义（t=2．891，P=0．006）；胃癌组早期相与延迟相SUVmax分别为5．131±2．486与6，156±3．126（f=-3．691，P=0．002）；胃淋巴瘤组则分别为9．183±7．770与11．744±10．222（t=4．095，P=-0．001），差异均有统计学意义。[结论]18F．FDGPET／CT显像在胃部良恶性疾病鉴驯青而且右雷尊作用

英文摘要：

[Prupose ] To study the value of ~SF-FDG PET/CT imaging in the differential diagnosis of gas- tric diseases. [Methods] Forty-nine patients clinically suspicious of gastric diseases underwent 18F-FDG PET/CT,and the data including distribution,thickness,the maximum of standard uptake value （SUV） of lesions were reviewed. [Results] Thickness of the benign and malignant lesions was （13.800＋3.489）mm and （18.088＋8.575）mm respectively（t=-2.486,P=0.017）,with significant difference between them. The SUV~= of early-phase of the benign and malignant lesion was 3.607＋2.710 and 7.277＋6.175 respective- ly（t=-2.891 ,P=0.006）,with significant difference. The SUV in early-phase and delay-phase of gastric carcinoma was 5.131 ±2.486 and 6.156 ＋3.126 respectively （t=-3.691, P=O.002）, and that in lymphoma was 9.183±7.770 and 11.744＋10.222 respectively （t=-4.095, P= 0.001）, both with significant difference. [Conclusions] lSF-FDG PET/CT imaging has certain value in the differential diagnosis of benign and malignant diseases of stomach.