Signal characteristics of MR T2WI in prediction of HIFU treatment outcome for adenomyosis / 中国介入影像与治疗学

ABSTRACT

Objective To investigate the effect of signal characteristics of MR T2WI for predicting HIFU treatment outcome for adenomyosis.Methods According to signal characteristics of MR T2WI before HIFU treatment,502 adenomyosis patients were divided into group Ⅰ (lesions with most hypointense and/or little isointense) and group Ⅱ (lesions with most isointense and/or little hypointense).Then patients in each group were further subdivided into subgroup A (without slightly and extremely hyperintense foci in the lesions),subgroup B (with slightly hyperintense foci in the lesions) or subgroup C (with extremely and/or slightly hyperintense foci in the lesions).The correlation of signal characteristics of MR T2WI for adenomyosis on HIFU ablation results and parameters were analyzed.Results There was no statistical difference of non-perfused volume ratio (NPVR) between group Ⅰ and group Ⅱ (t=-0.504,P=0.612).In both group Ⅰ and group Ⅱ,NPVR of subgroup A was higher than that of subgroup B and subgroup C,respectively (group ⅠLSD-t=2.608,3.677,P=0.009,＜0.001;group ⅡLSD-t=3.255,3.778,P=0.001,＜0.001).There was no statistical difference of NPVR between subgroup B and subgroup C (group ⅠLSD-t=-0.852,P=0.395;group ⅡLSD-t=0.278,P=0.781).There was no statistical difference of sonication time,total ablation energy and energyefficiency factor (EEF) between group Ⅰ and group Ⅱ,respectively (sonication timet=-1.716,P=0.087;total ablation energyt=-1.676,P=0.094;EEFZ=0.044,P=0.965).In both group Ⅰ and group Ⅱ,sonicationtime,total ablation energy and EEF of subgroup A were lower than those of subgroup B and subgroup C (all P＜0.05),while no statistical difference was found between subgroup B and subgroup C (all P＞0.05).Conclusion Signal characteristics of adenomyosis on MR T2WI can be used as predictors of HIFU treatment outcome for adenomyosis.