Application Value of High Resolution T2 Combined with Diffusion Weighted Image in Preoperative TNM Stag-ing and Assessment of Rectal Cancer
Objective To investigate the application value of high resolution magnetic resonance(MR)T2 weighted imaging(T2 WI)combined with diffusion weighted imaging(DWI)in the preoperative TNM staging of rectal cancer patients.Methods A total of 102 patients with rectal cancer admitted to our hos-pital from January 2021 to January 2023 were selected for preoperative T2 WI and DWI sequential scan-ning.The consistency of TNM staging on T2 WI combined with DWI was evaluated by Kappa consistency test using pathological diagnosis results as the gold standard.Results The total accuracy rate of T2 WI combined with DWI in the diagnosis of T staging of rectal cancer was 90.20%(92/102),and the consis-tency with the pathological T staging was very good(Kappa=0.864,P<0.05).The sensitivity,speci-ficity and accuracy of T1,T2,T3 and T4 stages were respectively 100.00%,98.84%and 99.02%;82.35%,95.29%and 93.14%;92.00%,93.06%and 92.62%;84.21%,100.00%and 97.06%.The over-all accuracy rate of T2 WI combined with DWI in the diagnosis of N staging of rectal cancer was 79.41%(81/102),which was in good agreement with pathological N staging(Kappa=0.705,P<0.05).The sensitivity,specificity and accuracy of N0,N1 and N2 stages were respectively 87.30%,87.18%and 87.25%;56.52%,86.08%and 79.41%;81.25%,94.19%and 92.16%.Conclusion The accuracy rate of T2 WI combined with DWI in the diagnosis of TNM staging of rectal cancer is higher,which is helpful to provide reference for clinical diagnosis.
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