40层18F-FDG PET/CT在直肠癌N分期中的应用

目的 评价40层18F-脱氧葡萄糖正电子发射体层摄影术(FDG PET)/CT对直肠癌淋巴结转移的诊断价值.方法 回顾性分析31例经手术病理检查证实的直肠癌PET/CT表现,按解剖学定位统计直肠癌区域淋巴结的数目、大小、分布、代谢情况并与病理检查结果 进行对比分析.结果 同机40层CT以5、8、10 mm作为参考标准,...

Cinical role of 18F-FDG PET/CT for nodal staging of rectal cancer

Objective To research the diagnostic value of 40-slice spiral 18F-FDG PET/CT for lymph node metastasis of rectal cancer.MethodsFor 40 patients with rectal cancer who had final diagnosis of patholog,abnormal FDG uptake,associated lymph node diameter,unmber,distribution and maximum standardized uptake valus(SUVmax)and pathologic reiuels were comparatively analyred.Resultsthe sensitivity,specificity and accuracy by lymph node diameter using cutoff value of 5,8,10 mm were 4.6%,40.6%,53.3%;61.5%,87.5%,80.0%;28.8%,93.7% and 75.0% respectively,and those by SUVmax using cutoff value of 1.0,2.0,3.0 were 100%,37.5%,55.6%;90.4%,82.8%,85.0%;78.8%,95.3 and 90.5% respectively.combining two criteria,the accuracy was 90% by PET/CT.ConclusionLymph nodes in region of rectum can be shown clearly with 40-slice spiral 18F-FDG PET/CT;Combining 5-8 mm cutoff value of lymph node diameter with 2.0-3.0 cutoff value of SUVmax may improve the accuracy of rectal cancer N staging.