Comarative Study of MRI and US in the Diagnosis of Adenomyosis

Objective The aim of this study was to compare the diagnostic performance of Magnetic Resonance Imaging(MRI) with Ultrasound(US) examination in the diagnosis of uterine adenomyosis. Materials and Methods 102 women who were suspected uterine adenomyosis or leiomyoma in initial clinical diagnosis were enrolled. All patients respectively were subjected to MRI and US. Moreover, they underwent diffusion-weighted imaging(DWI) in addition to routine MR imaging,and measured ADC value of lesion tissues and compared statistical differences. 40 patients were underwent dynamic enhanced scans. Histopathologic examination was conducted as the golden standard. Results 1. The sensitivity, specificity, accuracy for diagnosis of MRI adenomyosis were 91.67%, 96.30%, 94.12%, 95.65%, 92.86%, 24.78, 0.09. The sensitivity, specificity, accuracy and PPV, NPV, LR+ and LR- for diagnosis of US adenomyosis were 78.72%, 87.27%, 83.33%, 84.09%, 82.76%, 6.18, 0.24. The comparison of sensitivity, specificity and accuracy of two diagnosis had significant differences on statistics(P=0.000, 0.022, 0.0150.05). 2. b=700s/mm2, the ADC value of adenomyosis 1.59 ± 0.20 × 10-3mm2/s, myoma of uterus ADC value 1.70 ± 0.33 × 10-3mm2/s. There are notable discrepancy on statistics(P = 0. 004 0.05). Conclusion1 The sensitivity, specificity, accuracy for MRI are more superior than for US in the diagnosis of adenomyosis, and MRI examination has outstanding clinical practical value. 2.There are significant discrepancy on statistics between ADC values of adenomyosis and uterine myoma, suggest that their pathological changes and spatial structure should be different.