Value of diffusion-weighted MRI in the diagnosis of T staging for rectal cancer
10.3760/cma.j.issn.1671-0274.2015.03.013
- VernacularTitle:磁共振扩散加权成像对直肠癌T分期的诊断价值
- Author:
Zhihua LU
1
;
Weixin QIAN
;
Wenhong CAO
;
Honghuan YAO
;
Xiaowei ZHOU
;
Yan CAO
Author Information
1. 苏州大学附属常熟医院放射科
- Keywords:
Rectal neoplasms;
MRI;
Diffusion-weighted imaging;
T stage;
Diagnosis
- From:
Chinese Journal of Gastrointestinal Surgery
2015;(3):257-261
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of diffusion-weighted imaging (DWI) in the diagnosis of T staging for rectal cancer. Methods Clinicopathologic data and MR images of 46 patients with rectal cancer in our hospital from July 2013 to September 2014 were retrospectively analyzed. The diagnostic sensitivity, specificity and accuracy of T2WI were compared with those of T2WI plus DWI in T staging for rectal cancer. The relationship of mean apparent diffusion coefficient (ADC) value with different T stages of rectal cancer was analyzed. Results There were no significant differences in the diagnostic sensitivity, specificity and accuracy between T2WI and T2WI plus DWI (all P>0.05). The mean ADC value of DWI performed in pathologic T2, T3a, T3b, T3c and T4 stage was (1.110±0.117) ×10-3 mm2/s, (1.035±0.121)×10-3 mm2/s, (0.948±0.109)×10-3 mm2/s, (0.932±0.122)×10-3 mm2/s and (0.843±0.050)×10-3 mm2/s, respectively (F=6.972, P=0.000). Conclusion DWI can serve as a complement for T2WI in the diagnosis of T stage patients with rectal cancer , and its ADC value presents a downward trend with the advance of T stage.
