Biplane transrectal ultrasound combining superb microvascular imaging in evaluating preoperative T staging of mid-low rectal cancer
10.3760/cma.j.cn113855-20230223-00088
- VernacularTitle:双平面经直肠腔内超声联合超微血流成像在中低位直肠癌术前T分期中的应用价值
- Author:
Wei CHENG
1
;
Qin XIA
;
Anping REN
;
Jiaojiao HU
;
Xiaojing YAO
;
Tao LI
Author Information
1. 陆军军医大学大坪医院超声诊断科，重庆 400042
- Keywords:
Rectal neoplasms;
Neoplasm staging;
Ultrasound;
Superb microvascular imaging
- From:
Chinese Journal of General Surgery
2023;38(9):662-668
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the application value of biplane transrectal ultrasound (TRUS) combining superb microvascular imaging (SMI) in evaluating preoperative T stage of mid-low rectal cancer.Methods:From Jan 2021 to Apr 2022, 90 patients with middle and low rectal cancer undergoing surgical treatment in Da Ping Hospital, Army Medical Center of PLA were equally divided into trial group and control group . Patients in the control group received TRUS combining with color Doppler blood flow imaging (CDFI) mode, patients in the trial group received additional SMI . Preoperative ultrasound T staging was performed. Artery blood flow resistance index (RI), pulsation index (PI), peak systolic velocity (PSV), and end diastolic velocity (EDV) of tumors were measured and recorded. Receiver operating characteristics curves were drawn to evaluate the diagnostic efficacy.Results:The accuracy rate of the control group was 67% (30/45), and the consistence with the pathological stage (Kappa=0.510, P<0.05) was lower than that of 84% (38/45) and (Kappa=0.779, P<0.001) of the trial group ( χ2=3.850, P<0.05). Among different T stages, the difference of RI and PI were significant ( F=5.619, P=0.002; F=25.500, P<0.001), the difference of PSV was not significant ( F=1.464, P=0.231), and the difference of EDV was weakly correlated ( F=2.723, P=0.05). The ROC curves showed that the area under curve of RI, PI, EDV, and PSV was 0.573, 0.517, 0.527 and 0.501, respectively. With the diagnostic sensitivity rate for T1 to T4 as 70.4%, 58.8%, 93.3%, 68.8%, while the diagnostic specificity rate was 87.3%, 90.4%, 96.8%, 93.2%. Conclusion:Biplane TRUS combining SMI can improve the accuracy in preoperative ultrasound T staging of mid-low rectal cancer.
