Preliminary study of magnetic resonance diffusion tensor characteristics of uterine fibroids / 实用放射学杂志

ABSTRACT

Objective To evaluate the value of diffusion tensor imaging (DTI)in the assessment of uterine fibroids by analyzing uterine fibroids and normal myometrium.Methods Forty-four patients with uterine fibroids confirmed by surgery were included in this study.DTI was performed using double gradient GE HDxt 3.0T and HD Cardiac coil.All data were transferred to GE AW4.5 Workstation software for data processing.Apparent diffusion coefficient(ADC),fractional aniso(FA),volume ratio aniso(VRA)and T2-weighted trace of uterine fibroids and normal myometrium were recorded.Diffusion tensor tractography (DTT)of uterine fibroids and normal myometrium were reconstructed and observed.The ADC,FA,VRA and T2-weighted trace of different regions of interest (ROI)were compared between uterine fibroids and normal myometrium.Results The ADC,FA,VRA and T2-weighted trace of uterine fibroids and normal myometrium were (1.65±0.32)×10 -9 mm2/s and (1.21±0.97)×10 -9 mm2/s,0.20±0.08 and 0.28±0.08,0.05 ± 0.05 and 0.09±0.07,344.22±66.1 9 and 318.97±98.48,respectively.The ADC of normal myometrium was higher than that of uterine fibroids (P =0.009).The FA and VRA of normal myometrium were lower than those of uterine fibroids (P =0.000,P =0.005). There was no statistically significant difference of T2-weighted trace between uterine fibroids and normal myometrium (P =0.1 74). There were obvious differences between uterine fibroids and normal myometrium in direction,arrangement and number of fibers. Conclusion DTI can be used to evaluate the structure difference between uterine fibroids and normal myometrium,which has the potential to improve assessment value of MRI for uterine fibroids.