3.0T MR扩散加权成像对膀胱癌T分期的诊断价值  

Diagnostic Value of Diffusion Weighted Imaging in T Stage of Bladder Cancer By 3.0T MR

作　　者：周国兴[1] 沈璐[1] 赵江民[1] 王葳[1] 王软斌[1] 宗根林[1] 汪波[1] 郝楠馨[1] 

机构地区：[1]同济大学附属东方医院医学影像科MRI室,上海200120

出　　处：《临床放射学杂志》2011年第5期681-684,共4页Journal of Clinical Radiology

摘　　要：目的探讨MR扩散加权成像(DWI)对膀胱癌T分期的诊断价值。资料与方法使用Philips Achieva3.0 T高场强超导型MR机,应用腹部多通道相控阵线圈,对44例膀胱癌患者,共71处病灶行MR检查,观察其DWI表现,并与手术病理分期结果进行对照分析。结果 71处病灶中,有蒂型病灶占60.56%(43/71),在DWI上均表现为"C"形或"拱"形样结构,其T分期的诊断符合率为95.35%(41/43)。DWI诊断膀胱癌T分期的准确度非常高,其准确度、敏感度和特异度分别为88.73%、84%、91.3%。DWI对膀胱癌T分期准确性优于T2WI(71.83%),但联合T2WI,可提高其对分期诊断的准确性(90.14%)。结论 3.0 T高场强MR DWI所表现"C"形或"拱"形样结构,可作为早期膀胱癌较特征性的诊断征象。联合其他序列,可提高DWI对分期的诊断准确性。Objective To evaluate the ability of diffusion-weighted imaging in diagnosing T stage of bladder cancer.Materials and Methods 44 patients（71 lesions）underwent DWI with a 3.0 T MR scanner using a abdominal array multi-coil.Their DWI findings were analyzed and compared with surgical and pathological stages.Results 43 lesions（60.56%,43/71） with stalks were showed ＇C-shaped or arch-shaped ＇characteristic appearance.The accuracy of DWI in deciding the stage of papillary bladder cancer with a stalk was 95.35%（41/43）.In diagnosing T-stage of bladder cancer,accuracy of DWI was 88.73%,sensivity 84%,specificity 91.3%.DWI was superior to T2WI（71.83%）in the staging,but DWI plus T2WI had better diagnostic accuracy（90.14%）.Conclusion The characteristic appearance of ＇C-shaped or arch-shaped ＇is indicative of early stage bladder cancer by DWI with 3.0T MR.Combined other sequence images,DWI has better accuracy of T stage diagnosis.

关 键 词：膀胱癌 磁共振成像 扩散加权成像 肿瘤分期 

分 类 号：R737.14[医药卫生—肿瘤]