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目的探讨磁共振弥散加权成像(DWI)及磁共振背景弥散加权成像(DWIBS)等序列;其对检查直肠癌术前的转移淋巴结中发挥的辅助诊断价值。方法 2015年12月至2016年12月期间,对本院收治的60例经病理检查确诊后的直肠癌术前患者行常规盆腔MR、MR-DWI及MR-DWIBS检查进行结果分析,根据直肠癌病灶旁的淋巴结形态、分布情况、大小及表现弥散系数(ADC值);与术后病理检查结果进行比较。结果 60例经磁共振检查均被诊断为直肠癌,结果和术后的病理结果符合,ADC值分别为(0.86±0.13)×10-3mm2/s及(0.98±0.27)×10-3mm2/s,两者比较差异均有统计学意义(P<0.001)。结论磁共振弥散加权成像(DWI)及磁共振背景抑制弥散加权成像(DWIBS)在术前直肠癌中发生转移淋巴结的诊断中具有一定的价值,其有利于直肠癌临床治疗方案的制定。
Objective To investigate the sequence of DWI and DWIBS in diagnosis of metastatic lymph nodes before operation in rectal cancer. Methods Between December 2015 and December 2016, 60 cases of preoperative patients with rectal cancer confirmed by pathological examination underwent routine pelvic MR, MR-DWI and MR-DWIBS examinations. According to the results of rectal cancer The shape, distribution, size and diffusion coefficient (ADC value) of lymph nodes beside the lesion were compared with the postoperative pathological findings. Results Sixty cases were diagnosed as rectal cancer by MRI. The results were consistent with the postoperative pathological findings. The ADC values were (0.86 ± 0.13) × 10-3mm2 / s and (0.98 ± 0.27) × 10-3mm2 / s , The difference between the two was statistically significant (P <0.001). Conclusion DWI and DWIBS are valuable in the diagnosis of metastatic lymph nodes in preoperative rectal cancer, which is beneficial to the clinical treatment of rectal cancer.