MRI对异位妊娠诊断价值的探讨

The MRI diagnosis of extra－uterine pregnancy

目的探讨异位妊娠的MRI表现及其诊断价值。方法回顾性分析4例经临床手术病理证实为异位妊娠的MRI资料,并结合临床进行分析。结果4例异位妊娠均发生在输卵管,MRI检查时,2例未破裂,T1WI呈类圆形稍低信号内见更低信号改变,T2WI呈高信号改变,但胚囊壁的信号较囊内容信号更高。2例已破裂者表现为T1WI呈团块状低、等信号内散在或斑片状高信号影。T2WI呈斑片状高、等混杂信号改变。T2WI/IR压脂序列,原T1WI、T2WI均为高信号的区域仍然呈高信号。破裂的异位妊娠包块较大,且盆腔内可见积血的异常信号影。结论MRI对异位妊娠具有一定的特异性征象,结合临床表现可作出准确诊断。

Objective It's an investigation of the finding and diagnostic val ue of MRI in extrauterine pregnancy.Methods A retrospective analysis of the MR images and clinical data was made in 4 cases with extra－uterine pregnancy. All cases were confirmed by surgery and pathology. Results All lesions were found i n oviducts. Un－ruptured oviductal pregnancy represented a round hypo－intense a rea with a lower signaled center on T1WI, and a hyper－intense area on T2WI, whi le higher signal of the embryo sac wall was revealed on T2WI. In the rest 2 case s, ruptured ectopic pregnancy presented with a complicated intense mass on T1WI, where hyper－intense patches were scattered within lesion. On T2WI, the rupture d oviductal pregnancy was a mixture of iso－intense or hyper－intense components . On T2WI/IR fat suppressing sequence the hyper－intense area remained high sign al intensity. A ruptured oviductal pregnancy resulted in a larger mass with hemo rrhage found in pelvic cavity. Conclusion Extra－uterine pregnancy has characte ristic MRI manifestations, by which an accurate diagnosis is established with cl inical data.