Abstract：Objective To compare the value of T MRI and CT in evaluating the efficacy of middle and late stage low rectal cancer after
neoadjuvant chemoradiotherapy (NACRT). Methods A total of 182 patients with rectal cancer who were admitted to our hospital
February 2016 to February 2018 were selected as the study subjects. Patients were randomly divided into two groups: 90 cases in the
study group were examined by MRI before and after NACRT; 92 cases in the control group were examined by MSCT before and after
NACRT. The changes of tumor volume, T stage, N stage and circumferential margin (CRM) of patients in the two groups before and
after NACRT were analyzed and compared with pathological results. Results For the two groups, there were significant differences
in T and N stages before and after NACRT (P<0.05). Compared with the pathological results after operation, the consistency of T
staging after NACRT in the study group was good (Kappa=0.552), the consistency of CRM involvement was good (Kappa=0.702),
and the consistency of N staging was poor (Kappa=0.342). Compared with the pathological results after operation, the consistency of
T staging after NACRT in the control group was good (Kappa=0.514), the consistency of CRM involvement was good (Kappa=0.683),
and the consistency of N staging was poor (Kappa=0.297). There was no significant difference in the accuracy of T staging, N staging
and CRM involvement between the two groups (χ2=0.009, 0.000 and 0.043, P>0.05). Conclusion NACRT can significantly reduce
tumor volume and reduce staging, but it has no significant impact on CRM. Both MRI and MSCT can accurately determine the
degree of tumor infiltration. MRI consistency is better than MSCT, but there is no significant difference in accuracy.
Key words: middle and low advanced rectal cancer; neoadjuvant chemoradiotherapy; magnetic resonance imaging; multisliecs
helical CT
杨军克a，蒙以良b，王运成c. 3.0T MRI与CT在评价术前新辅助放疗或同步放化疗对中晚期低位直肠癌疗效中的应用价值[J]. 中国医疗设备, 2019, 34(11): 79-81.
YANG Junkea, MENG Yiliangb, WANG Yunchengc. Application Value of 3.0T MRI and CT in Evaluating the Efficacy of Middle and Late Stage
Low Rectal Cancer After Neoadjuvant Chemoradiotherapy. China Medical Devices, 2019, 34(11): 79-81.
