Application value of the diffusion-weighted imaging in combination with dynamic enhanced MRI in detection of peripheral zone of hepatic alveolar echinococcosis
10.3969/j.issn.1002-1671.2015.09.014
- VernacularTitle:3.0TMRI扩散加权成像结合动态增强扫描在肝泡球蚴病边缘带的诊断价值
- Author:
Li MENG
;
Haihua BAO
- Publication Type:Journal Article
- Keywords:
echinococcosi;
hepatic;
peripheral zone;
duffusion-weighted imaging;
apparent diffusion coefficient;
enhanced ratio
- From:
Journal of Practical Radiology
2015;(9):1460-1462,1470
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the application value of the diffusion-weighted imaging (DWI)and dynamic contrast-enhanced MRI in detection of peripheral zone of hepatic alveolar echinococcosis (HAE).Methods Twenty patients with HAE underwent abdominal plain scan,DWI and dynamic enhanced MRI.The ADC values and enhanced ratio of the central necrosis,solid component,peripheral zone and normal liver parenchyma were measured at a workstation,and further were analyzed and compared.Results 32 lesions were detected in 20 patients with HAE.Two groups were divided according to the lesion with central necrosis (group A)or not (group B).In group A, the ADC values of the solid part and normal liver parenchyma were (1.52±0.30)×10 -3 mm2/s and (1.22±0.30)×10 -3 mm2/s. Meanwhile,in group B those were (1.50±0.25)×10-3 mm2/s and (1.03±0.28)×10-3 mm2/s,exhibiting no statistical differences between the two groups.In group A and B,the ADC values of the peripheral zone of lesion were 1.34(1.10,1.61)×10 -3 mm2/s and 0.96 (0.86,1.22)×10 -3 mm2/s,exhibiting statistical differences (Z =2.867,P =0.004);meanwhile,the enhanced ratio were 1.70± 0.36 and 1.58±0.30,exhibiting no statistical difference.No correlation between ADC values and enhanced ratio was found in the peripheral zone.Conclusion DWI at 3.0T can display visually the HAE,and the ADC value may reflect the DWI features of periph-eral zone.The ADC values in combination with enhanced ratio may help for the diagnosis.
