Clinical Utility of the Prenatal Ultrasound Score of the Placenta Combined with Magnetic Resonance Imaging in Diagnosis of Placenta Accreta during the Second and Third Trimester of Pregnancy

Table 4

Between-group comparison of patients’ MRI signs [n(%)].

MRI signs	Accreta group (n = 75)	Non-accreta group (n = 33)	X^2
Placental heterogeneity	39 (52)	4 (12.12)	15.209	<0.001
Non-distinct placenta-uterus boundary	35 (46.67)	14 (42.42)	0.166	0.683
Bulge of lower segment of the uterus and local thickening of the placenta	37 (49.33)	2 (6.06)	18.600	<0.001
Increased local blood vessel in the placenta	33 (44)	12 (36.36)	0.550	0.458
Local tentiform thickening or nodular projection of the bladder	19 (25.33)	5 (15.15)	1.375	0.241