T2 VISTA联合DWI及DCE-MRI在直肠癌术前局部分期中的临床价值

The Clinical Value of T2 VISTA associated with DWI and DCE-MRI for Preoperative Local Staging of Rectal Cancer

目的:探讨T2 VISTA联合扩散加权成像(DWI)及动态增强扫描(DCE-MRI)对直肠癌术前局部分期(TN分期)的临床价值。方法:回顾性分析经术后病理证实为直肠癌患者30例的常规序列扫描、T2 VISTA、DWI及DCE-MRI扫描,比较浸润情况的影像学分期与术后病理组织学分期。结果:T2 VISTA结合DWI及DCEMRI较常规序列能更好地显示肠壁的各层解剖结构,能更准确地评估肿瘤对肠壁及其邻近结构的侵犯范围、程度及直肠系膜筋膜内淋巴结转移情况。结论:T2 VISTA结合DWI及DCE-MRI较常规序列能对直肠癌TN分期做更准确的诊断。

Objective： To explore the value of MR volumetric isotropic T2-weighted acquisition （VISTA） associated with DWI and DCE-MRI for evaluation clinical staging of rectal cancer preoperative. Method： 30 patients with rectal carcinoma confirmed by operation and pathology were performed conventional MR imaging, thin section MR scan, DWI and DCE-MRI examinations. All cases were staged by radiology imaging and pathology result respectively, and the two staging results were compared. Results：According to the gold standard of pathological stage, Thin section MR imaging associated with DWI and DCE-MRI was better on showing the anatomic structures of bowel and the invasion to surrounding structures than conventional MR imaging. Conclusion： Thin section MR imaging associated with DWI and DCE-MRI is better than conventional MR imaging in preoperative local staging of rectal cancer （TN）.