MR背景信号抑制弥散加权成像对肠道肿瘤的诊断价值

目的 评价MR背景信号抑制弥散加权成像(DWIBS)对肠道肿瘤及肿瘤转移的诊断价值.方法 15例肠道肿瘤均行常规MRI扫描及MR背景信号抑制扩散加权成像(DWIBS),4例行CT扫描.结果 15例肠道肿瘤在常规MRI及DWIBS像上均显示了原发肿瘤,DWIBS显示4例肿瘤侵犯浆膜层,5例腹腔种植转移,5例淋巴结转移;MRI显示10例肿瘤侵犯浆膜层,8例脂肪侵犯,3例腹腔种植转移,3例淋巴结转移.结论 DWIBS对原发肿瘤、腹膜种植转移、淋巴结转移的显示方面优于常规MRI及CT,对浆膜及周围脂肪侵犯显示方面较常规MRI及CT差.

Diagnostic Vlaue of Diffusion Weighted Imaging with Background Body Signal Suppression in Tumors of Intestinal Tract

Objective To estimate the value of diffusion weighted imaging with background body signal suppression(DWIBS)in tumors of intestinal tract and metastasis.Methods 15 cass with tumors of intestinal tract underwent MRI and DWIBS examinations.Four of them underwent CT scan.Results All primary tumors were showed by conventional MR sequences and DWIBS.DWIBS showed that 4 cases had the invasion of placenta percreta,5 cases had transcoelomic metastasis in abdominal cavity and 5 cases had lymphatic metastasis,while the conventional MR sequences showed the invasion of placenta percreta in 10 cases,the invasion of fat interspace in 8 cases,transcoelomic metastasis in abdominal cavity in 3 cases and lymphatic metastasis in 3 cases.Conclusion DWIBS is better than the conventional MR sequences and CT in detecting the primary tumor of intestinal tract,transcoelomic metastasis in abdominal cavity and lymphatic metastasis.However,the conventional MR sequences and CT is better than DWIBS in detecting the invasion of placenta percreta and fat interspace.