术前MRI定义直肠癌术前肿瘤范围的准确性研究  

Accuracy of Preoperative MRI in the Definition of Preoperative Tumor Range of Rectal Cancer

作　　者：亓燕 董莹 范小波 玄国庆 孙玉清 QI Yan;DONG Ying;FAN Xiao-bo;XUAN Guo-qing;SUN Yu-qing(People's Hospital Affiliated to Shandong First Medical University,Image Center,Jinan 271199,Shandong Province,China)

机构地区：[1]山东第一医科大学附属人民医院影像中心,山东济南271199

出　　处：《中国CT和MRI杂志》2023年第6期141-143,共3页Chinese Journal of CT and MRI

摘　　要：目的研究术前磁共振成像(MRI)检测直肠癌定义肿瘤范围的准确性。方法选取2017年1月至2018年7月将进行直肠周围系膜全切除术的直肠癌患者35例,术前行MRI盆腔检测。测量肿瘤沿肠管纵轴长度,垂直肠管横轴位肿瘤最宽径和实际面积,并与术后病理测量参数对比评估MRI影像测量的准确性。结果T_(2)WI测量直肠癌长度值长于病理标本测量结果,T_(1)WI、DWI测量长度值短于病理测量结果(P<0.05),与Lpath-L相关系数分别为0.689、0.641、0.792(P<0.05)。T_(2)WI、T_(1)WI、DWI在测量肿瘤横截面最宽径、肿瘤面积、肿瘤体积均大于病理标本测量(P<0.05),其中DWI在测量肿瘤横截面最宽径与肿瘤体积与病理标本测量结果相关性较高,相关系数分别为0.847和0.576(P<0.05)。结论在病变长度方面,各影像存在-6.6~6.5 mm差异;横截面最宽径、肿瘤横截面积、体积方面均存在不同程度高估。Objective To explore accuracy of preoperative magnetic resonance imaging(MRI)in the detection of definition of tumor range of rectal cancer.Methods 35 patients with rectal cancer who underwent complete circumferential mesoretal excision from January 2017 to July 2018 were selected.Pelvic MRI was performed pre-operation.The vertical axis length of tumor along intestinal canal,and the tumor widest diameter and actual area in the horizontal axis of vertical intestine were measured,and they were compared with the corresponding parameters of postoperative pathological specimen measurement,and the accuracy of MRI image measurement was evaluated.Results The length of rectal cancer measured by T_(2)WI was longer than that by pathological specimen measurement,and the length measured by T_(1)WI and DWI was shorter than that by pathological measurement(P<0.05),and the correlation coefficient values with Lpath-L were 0.689,0.641 and 0.792(P<0.05).The widest diameter,tumor area and tumor volume of tumor cross-section measured by T_(2)WI,T_(1)WI,DWI was larger than that by pathological specimen measurement respectively(P<0.05),and the correlation between DWI and pathological specimen measurement was higher in the widest diameter and tumor volume of tumor cross-section,and the correlation coefficient values were 0.847 and 0.576 respectively(P<0.05).Conclusions In terms of lesion length,there are differences of-6.6-6.5 mm in each image.The widest diameter of cross-section,tumor cross-sectional area and volume are overestimated in different degree.

关 键 词：磁共振成像 直肠癌 肿瘤定位 

分 类 号：R445.2[医药卫生—影像医学与核医学] R574.63[医药卫生—诊断学]