低场强磁共振成像诊断放射治疗前后宫颈癌的临床价值

Low Field Strength MRI in Diagnosis and Evaluation of the Therapeutic Effect of Radiotherapy on Uterus Cervical Cancer

目的:探讨低场强MRI在子宫颈癌及其放射治疗后的诊断价值。方法:35例经病理学诊断为子宫颈癌在治疗前根据低场强MRI表现做出临床分期,其中21例子宫颈癌在放疗后行低场强MRI复查。结果:子宫颈癌MRIT2WI呈均匀或不均匀高信号软组织肿块,T1WI呈等或低信号,增强扫描呈不均匀增强。放射治疗后肿瘤组织纤维化,T2WI表现为低信号。结论:MRI平扫T2WI为子宫颈癌检查的首选序列,MRI检查对宫颈癌显示清楚,分期可靠,对放射治疗疗效及预后评价具有重要意义。

Objective：To evaluate the value of low field strength MRI in the diagnosis,preoperative staging and tumor response to radiotherapy of uterus cervical cancers（UCC）.Methods：The findings and staging of UCC with MRI was evaluated prospectively in 35 patients with histological proven tumor.21 patients with UCC who underwent radiotherapy were examined again to assess the effectiveness of radiotherapy treatment.Results：UCC showed heterogeneous and homogeneous hyperintensity on T2WI,hypointensity and isointensity on T1WI,mild heterogeneous enchancement after bolus intravenous Gd2DTPA.Post irradiated UCC with hypointensity on T2WI indicated fibrosis.Conclusions：T2WI sequence is the first choice in examining UCC.MRI can well demonstrate the size and extension of the cervical carcinoma.It is very helpful in staging of the disease and making the therapeutic plan.