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 1

Ultrasound scoring criteria for placenta accreta.

Evaluation dimension	2 points	1 point	0 point
Placenta location	Complete praevia	Marginal or low-lying	Normal
Placenta thickness	>5 cm	3–5 cm	<3 cm
Postplacental low echo band	Disappeared	Locally interrupted	Continuous
Bladder line	Disappeared	Interrupted	Continuous
Placental lacunae	Fused into patch	Yes	No
Blood flow signals at the base of the placenta	Appearance of “border-crossing” blood vessel	Increasing or agglomerating blood flow	Regular basilar blood flow
Cervical sinusoid	Fused into patch	Yes	No
Cervical morphology	Disappeared	Not complete	Complete
History of caesarean section	Twice and above	Once	No