MRI-based estimation of liver function by intravoxel incoherent motion diffusion-weighted imaging
Zhang Jing
Guo Yihao
Tan Xiangliang
Zheng Zeyu
He Mengqi
Xu Jun
Mei Yingjie
Zhang Jiajun
Zhao Xixi
Wang Chunhong
Feng Yanqiu
Chan Queenie
Wu Yuankui
Xu Yikai
· 2016
期刊名称:
Magnetic Resonance Imaging
2016 年
34 卷
8 期
摘要:
Purpose To explore the usefulness of intravoxel incoherent motion (IVIM) to evaluate the hepatic functional reserve as expressed by the model for Child??“Pugh class. Materials and methods IVIM diffusion-weighted imaging (DWI) using 10 different b values were performed on a Philips 3.0??T MR scanner in 70 patients with liver cirrhosis and 60 healthy volunteers as the control group. Patients with liver cirrhosis were subdivided into three groups: Child??“Pugh class A: 29 cases; Child??“Pugh class B: 19 cases; Child??“Pugh class C: 22 cases. Pure molecular diffusion (D), pseudo-diffusion (D*), perfusion fraction (f) and apparent diffusion coefficient (ADC) values were calculated, and used to determine liver function, as indicated by the Child??“Pugh class. Results The ICC values of D, D*, f and ADC between two radiologists were 0.997, 0.986, 0.985 and 0.995, respectively. D*, f and ADC values of liver cirrhosis group were significantly lower than control group (P???0.001, P??=??0.016, P??=??0.042, respectively). D*, f and ADC values significantly decreased with increasing Child??“Pugh scores (p???0.05). Child??“Pugh scores were inversely correlated with D* and f values (r??=????’??0.423, r??=????’??0.620, respectively). The areas under the curve (AUCs) of D* and f for evaluating liver function were 0.67??“0.90 and 0.78??“0.89, respectively. Conclusion IVIM DWI may be a useful image-based method for assessing liver function.