Measurement of quantitative parameters for intravoxel incoherent motion MR imaging of uterine fibroids
10.3969/j.issn.1002-1671.2017.04.030
- VernacularTitle:不同定量测量参数对子宫肌瘤IVIM扩散和灌注特点显示的差异
- Author:
Rong RONG
;
Jia LIU
;
Jing LIU
;
Juan WEI
;
Xiaoying WANG
- Keywords:
uterine fibroids;
intravoxel incoherent motion;
diffusion weighted imaging;
magnetic resonance imaging
- From:
Journal of Practical Radiology
2017;33(4):603-607
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate different measurement methods in histogram for the diffusion and perfusion parameters from intravoxel incoherent motion (IVIM) MR imaging of different types of uterine fibroids.Methods 63 patients with confirmed uterine fibroids (80 in total) were examined with MR imaging.3D T2WI and IVIM imaging were performed for those patients.The fibroids were classified into three types (type 1, 2, 3) on the basis of different signal intensities on T2WI according to Funaki's theory.Real diffusion coefficient (D), pseudodiffusion coefficient (D*) and perfusion fraction (f) were calculated using IVIM analysis.25%,50% and 75% of those parameters (D25,D50,D75,D*25,D*50,D*75,f25,f50 and f75) as well as mean values (Dmean,D*mean and fmean) were calculated using histogram method.ANOVA was used to compare the IVIM parameters among the three types of fibroids.Results There were 44 type 1,24 type 2 and 12 type 3 fibroids in the total of 80 fibroids.There was significant difference among all the diffusion parameters from histogram and mean values of different types of fibroids, and only one perfusion parameter D*75 value showed significant difference (P<0.05).There was no significant difference among all the f values from histogram and mean values.Conclusion Different measurements of parameters from IVIM histogram showed no added value for diffusion features in different types of fibroids compared to mean value.While the perfusion parameter D*75 value from histogram can distinguish the features of perfusion within different types of fibroids compared to mean value.
