摘要目的：探讨MRI多序列检查在溃疡性结肠炎（ UC）病情评估中的价值。方法回顾性分析2011年6月至2015年8月本院62例溃疡性结肠炎的MRI、内镜和病理资料，分析病变肠管的MRI图像，将评估结果与内镜及病理所见进行对照。结果对62例UC患者的病变肠管进行分析；内镜及病理证实48例UC为活动期，14例为缓解期。48例活动期UC患者的病变肠管DWI均呈高信号，14例缓解期UC患者中12例病变肠管呈等信号，2例呈略高信号。活动期UC患者中有46例病变肠管MRI呈急性炎症表现，42例表现为粘膜及粘膜下层T1WI和T2WI均为高信号，4例表现为T1WI等信号、T2WI高信号，另2例表现为T2WI等信号、T1WI略高信号；缓解期UC患者中9例病变肠管MRI呈慢性炎症表现，表现为粘膜及粘膜下层T1WI和T2WI均为低信号，另5例表现为T1WI等信号、T2WI略高信号，MRI与内镜对溃疡性结肠炎活动性及病变范围的判断差异无统计学意义（P>0.05）。结论 MRI多序列检查在评估溃疡性结肠炎活动性及病变范围的判断具有较高诊断价值。

abstractsObjective To investigate the diagnostic value of multi?sequence MRI in evaluating the severity of ulcerative colitis(UC). Methods A retrospective analysis was performed on findings of MRI, endoscopy and pathological studies from 62 UC patients treated in our hospital between June 2011 and August 2015. The intestinal lesions on MRI images were analyzed and evaluated,and subsequently compared with endoscopic and pathological findings. Results The intestinal lesions in 62 UC patients were analyzed. Endoscopy and pathology confirmed 48 cases of active UC,and 14 in remission. Of the 48 patients with active UC,all intestinal lesions showed hyperintense signals on DWI. Of 14 UC patients in remission,the intestinal lesions on DWI showed isointense signals in 12 and mildly hyperintense signals in 2 patients. Of patients with active UC,the intestinal lesions on MRI showed signs of acute inflammation in 46 cases. Forty?two patients showed hyperintense T1WI and T2WI signals,4 showed isointense T1WI signals and mildly hyperintense T2WI signals,and the other 2 showed isointense T2WI signals and mildly hyperintense T1WI signals at the mucosa and submucosa. Of UC patients in remission,the intestinal lesions on MRI showed signs of chronic inflammation,showing hypointense T1WI and T2WI signals at the mucosa and submucosa in 9 patients,isointense T1WI signals and mildly hyperintense T2WI signals in the other 5 patients. MRI and endoscopy did not differ statistically in determining the activity and extent of lesions for UC (P>0.05). Conclusion Multi?sequence MRI may be of high diagnostic value in assessing the activity and the extent of lesions in ulcerative colitis.