背景抑制扩散加权成像及动脉自旋标记技术FAIR在直肠癌术前评估中的价值

The Value of DWIBS and Arterial Spin Labeling(FAIR)in Preoperative Evaluation of Rectal Cancer

目的探讨磁共振背景抑制扩散加权成像(DWIBS)及血流敏感性的交替反转恢复序列(FAIR)在直肠癌术前评估中的价值。方法对经肠镜证实的28例直肠癌患者,行盆腔DWIBS及FAIR检查。对比分析直肠癌与正常直肠壁间DWIBS信号强度、表观扩散系数(ADC)值、BF是否存在差异。结果直肠癌与正常直肠壁间DWIBS信号强度、ADC值及BF间存在差异(t=10.62,P<0.05;t=-8.81,P<0.05;t=18.77,P<0.05)。结论DWIBS及FAIR可以评估肿瘤浸润程度及血流灌注情况,在直肠癌术前评估中具有重要临床价值。

Objective To investigate the value of background suppression diffusion-weighted imaging(DWIBS)and arterial spin labeling(based on flow sensitive alternation inversion recovery labeling technology,FAIR)in preoperative evaluation of rectal cancer.Methods 28 patients with rectal cancer confirmed by colonoscopy were examined by pelvic magnetic resonance DWIBS and FAIR.The DWIBS signal intensity,ADC value and BF between rectal cancer and normal rectal wall were compared and analyzed.Results By statistical analysis,there were differences in DWIBS signal intensity,ADC value and BF between rectal cancer and normal rectal wall on DWIBS image and FAIR(t=10.62,P<0.05;t=-8.81,P<0.05;t=18.77,P<0.05).Conclusion The ADC value of rectal cancer tumor is lower than that of normal rectal wall,and the signal intensity and BF are higher than that of normal rectal wall.MRI DWIBS and arterial spin labeling can evaluate the degree of tumor invasion and blood perfusion,which has important clinical value in preoperative evaluation of rectal cancer.