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• Clinical Article •
Clinical application of small field-of-view T2WI in rectal carcinoma T staging
GUAN Shu  ZHU Shao-cheng  ZHANG Dan-xia  LI Chao 

DOI:10.12015/issn.1674-8034.2017.11.008.


[Abstract] Objective: To investigate the value of small field-of-view T2 weighted imaging in rectal carcinoma T staging and the correlation between tumor volume and T staging.Materials and methods: Ninety cases with rectal carcinoma confirmed by colonoscopy underwent MRI scanning, including conventional T2 weighted imaging and small field-of-view, thin-section T2 weighted imaging. Two radiologists analyzed T staging at the same time, and drew the outline of tumor boundary, in order to acquire tumor size of each layer and to calculate tumor volume. Consistency between T staging by small field-of-view T2WI and pathological method was compared, and the correlation between tumor volume by small field-of-view T2WI and pathological T staging was analyzed.Results: Small field of view T2 weighted imaging for T stage was highly consistent with pathological stage (Kappa=0.771). The diagnostic accuracy in predicting T stage was 84.44%. The accuracy, sensitivity and specificity for tumor of T1 stage were 96.67%, 80.00%, 97.65%, respectively. The accuracy, sensitivity and specificity for tumor of T2 stage were 88.89%, 80.00%, 92.31%, respectively. The accuracy, sensitivity and specificity for tumor of T3 stage were 86.67%, 82.05%, 90.20%, respectively. the accuracy, sensitivity and specificity for tumor of T4a stage were 96.67%, 95.24%, 97.10%, respectively. Moderate correlation in tumor volume was detected between MRI measurement and pathological T staging (r=0.657, P<0.05).Conclusions: Small field-of-view T2WI has relatively high application value in rectal carcinoma T staging, as well as in the tumor T staging evaluation before surgery and the selection of therapeutic schedule.
[Keywords] Rectal neoplasms；Magnetic resonance imaging；Neoplasm staging

GUAN Shu Graduate Department of Xinxiang Medical University, Xinxiang 453003, China; Department of Radiology, People's Hospital of Henan Province, Zhengzhou 450003, China

ZHU Shao-cheng* Department of Radiology, People's Hospital of Henan Province, Zhengzhou 450003, China

ZHANG Dan-xia Graduate Department of Xinxiang Medical University, Xinxiang 453003, China; Department of Radiology, People's Hospital of Henan Province, Zhengzhou 450003, China

LI Chao Graduate Department of Xinxiang Medical University, Xinxiang 453003, China; Department of Radiology, People's Hospital of Henan Province, Zhengzhou 450003, China

*Corresponding to: Zhu SC, E-mail: zsc2686@163.com

Conflicts of interest   None.

Received  2017-06-02
Accepted  2017-10-09
DOI: 10.12015/issn.1674-8034.2017.11.008
DOI:10.12015/issn.1674-8034.2017.11.008.

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