Value of high resolution MRI with DWI in the preoperative diagnosis of rectal cancer
10.3760/cma.j.issn.1006-9801.2011.07.003
- VernacularTitle:高分辨磁共振成像结合弥散加权成像对直肠癌术前诊断的价值
- Author:
Rui ZHANG
;
Hongxing JIN
;
Xiaotang YANG
;
Xiaosong DU
;
Xuanzhong ZHENG
- Publication Type:Journal Article
- Keywords:
Rectal neoplasms;
Magnetic resonance imaging;
Diffusion maghetic resonance imaging;
Diagnosis
- From:
Cancer Research and Clinic
2011;23(7):443-446
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of high resolution MR imaging (MRI) with diffusion weighted imaging (DWI) in the preoperative diagnosis of rectal cancer. Methods 55 patients with rectal cancer may underwent high resolution MRI examinations before surgical operation, and with DWI (b=600, 1000 s/mm2). The apparent diffusion coefficient (ADC) of the tumors were measured. The image findings were compared with pathology. Select 15 patients without rectal lesion, ADC value of the tumors and normal rectal wall were measured. Results High resolution MRI diagnosis rectal cancer sensitivity, specific degree and coincidence rate were 95.7% (45/47), 50.0% (4/8), 89.1% (49/55), high resolution MRI with DWI diagnosis colorectal cancer sensitivity, specific degree and coincidence rate were 100.0 % (47/47), 75.0 % (6/8), 96.4 % (53/55). The high resolution MRI tumor T-staging agreed with the histological stage that was 88.9% (40/45), the diagnosis of T2 stage was 87.5 % (14/16), the diagnosis of T3 stage was 89.6 % (26/29). The same b-valued under the ADC values of rectal cancer tumors and the normal rectal were different (P ＜0.05). No correlation can be pointed out between ADC and pathological classification of each tumor.Conclusion High resolution MRI with DWI for the rectal cancer preoperative diagnosis and T-staging has higher diagnostic accuracy, DWI can serve as an important supplement sequence of colorectal cancer diagnosis.
