Low-field MR imaging apprearences of uterine adenomyosis

Objective:To investigate the low-field MR features of adenomyosis and its diagnostic value.Methods:35 patients with adenomyosis confirmed by histopathology,who underwent MRI examination,were reviewed.MRI features and pathologic findings were compared.Results:12 cases were diagnosed with diffuse uterine adenomyosis.Nine showed diffusely thickened junctional zone.Three showed ill-defined margins.The lesions of uterine adenomyoses displayed hypo-intensive masses as the thickened junctional zone on T2WI,meanwhile,the lesions compried spot,coliform or sacculiform high-signal.10 cases appeared as equel-signal on T1W1,2 cases appeared as spot or orsacculiform high-signal.23 patients presented with topical uterine leinmynma,total 26 lesions were detected by MRI.There were 14 lesions in the posterior wall,10 lesions in the anterior wall,2 lesions in the basel wall,21 lesions were in the border of endometrium,five near the endometrium,22 lesions showed ill-defined margins,while 4 lesions defined margins. On T2WI,the lesions showed hypointensity as junctional zone with heterogeneous signals,the lesions showed slightly hypo-intensity or equel intensity on T1WI,Among the total,9 cases apreared local heterogeneous signals.Conclusion: ① uterine adenomyosis has characteristic apprearences which can manifest the pathologic feature in low field MRI.The shape appears diffusely thickened junctional zone or ill-defined margins.The MR imaging of uterine adenomyoses displays hypo-intensive masses with high-signal.(endometrial glands appear spot high-signal on T2WI.High-signals on T1WI prompt endometrial glands);② The lesions are identified clearly by sagittal T2WI and IRFSET2WI.Both are the most proper MRI sequenee of uterine adenomyosis.