Characteristic prenatal MRI signs in diagnosis of placenta accreta
10.13929/j.1003-3289.201709037
- VernacularTitle:产前MRI特征性征象诊断胎盘植入
- Author:
Jinchao DU
1
;
Furong LYU
;
Zhibo XIAO
;
Bo SHENG
;
Fajin LYU
;
Ziyu LIU
Author Information
1. 重庆医科大学附属第一医院放射科
- Keywords:
Magnetic resonance imaging;
Placenta,accreta;
Diagnosis
- From:
Chinese Journal of Medical Imaging Technology
2018;34(3):412-415
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of prenatal MRI signs in diagnosis of placenta accreta.Methods MRI data of 163 pregnant women with suspected placenta accreta were retrospectively reviewed.According to the results of cesarean section,they were divided into placenta accreta group (n =136) or without placenta accreta group (n =27).The differencesof MRI signs between the two groups were compared.Taking cesarean section results as the gold standard,the sensitivity,specificity,positive and negative predictive value of MRI signs were calculated,respectively.Results Uterine bulging,abnormal vessels and hypointense T2WI bands at junction of placental and myometrium,as well as uterine recess had statistical differences between the two groups (all P＜0.05).No statistical difference of placental heterogeneity,focal interruptions in myometrial wall,uterine penetration and parametrium implantation nor protrusion of placenta into cervix was found between the two groups (all P＞0.05).The MRI signs of uterine penetration and parametrium implantation,uterine recess,protrusion of placenta into cervix yielded a specificity and positive predictive value of 100％,respectively.Conclusion Prenatal MRI has high efficacy in the diagnosis of placenta accrete.Placenta accrete should be highly suspected especially in the presence of uterine penetration and parametrium implantation,uterine recess and protrusion of placenta into the cervix.
