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Application value of conventional MRI examination and diffusion weighted imaging in preoperative evaluation of rectal cancer
YANG Hongyu  GAO Xu  SHEN Xiuzhi  ZHONG Jiali  PENG Ruchen 

Cite this article as: Citation:Yang HY, Gao X, Shen XZ, et al. Application value of conventional MRI examination and diffusion weighted imaging in preoperative evaluation of rectal cancer[J]. Chin J Magn Reson Imaging, 2021, 12(9): 65-68, 87. DOI:10.12015/issn.1674-8034.2021.09.015.


[Abstract] Objective To analyze the value of conventional MRI and diffusion weighted imaging (DWI) in preoperative evaluation of rectal cancer. Materials andMethods The data of 42 rectal cancer patients in our hospital were collected retrospectively,all patients underwent pelvic MRI+DWI+enhancement scan before surgery,the T, N stages and circumferential resection margin (CRM) of rectal cancer were evaluated by MRI imaging performance, and the results were compared with the postoperative pathology to evaluate the accuracy of conventional MRI+DWI in the diagnosis of rectal cancer. The application value of DWI in the diagnosis and preoperative evaluation of rectal cancer was explored by measuring the ADC value of the tumor.Results The results showed good agreement between the preoperative T ,N stages and CRM assessed by conventional MRI+DWI and the postoperative pathological results (Kappa values of 0.745, 0.691 and 0.642, respectively). Comparison of ADC value of rectal cancer with different T stages showed that the higher the T stage with the lower the ADC value, and the difference of ADC value between groups was statistically significant (T1—2 group compared with T3 group: P=0.015;T3 group compared with T4 group: P=0.01). The ADC value of CRM-positive was lower than that of CRM-negative, and the difference was statistically significant (P=0.015).Conclusions Conventional MRI and DWI imaging have high application value in preoperative staging and CRM evaluation of rectal cancer. The value of ADC has a certain reference value for the diagnosis and preoperative evaluation of rectal cancer.
[Keywords] rectal cancer；magnetic resonance imaging；apparent diffusion coefficient value；tumor stage；pathology

YANG Hongyu1   GAO Xu2   SHEN Xiuzhi1   ZHONG Jiali1   PENG Ruchen1*  

1 Department of Medical Imaging, Beijing Luhe Hospital, Capital Medical University, Beijing 101149, China

2 Department of General Surgery, Beijing Luhe Hospital, Capital Medical University, Beijing 101149, China

Peng RC, E-mail: pengruchen@ccmu.edu.cn

Conflicts of interest   None.

Received  2021-03-03
Accepted  2021-04-01
DOI: 10.12015/issn.1674-8034.2021.09.015
Cite this article as: Citation:Yang HY, Gao X, Shen XZ, et al. Application value of conventional MRI examination and diffusion weighted imaging in preoperative evaluation of rectal cancer[J]. Chin J Magn Reson Imaging, 2021, 12(9): 65-68, 87. DOI:10.12015/issn.1674-8034.2021.09.015.

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