الفهرس 
Anatomical backgroundOnly 14 pages are availabe for public view
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Abstract
Background: In recent years, there has been increased interest in magnetic resonance (MR) imaging for the evaluation of placental abnormalities regarding location and implantation, since it can provide information on depth of invasion and more clearly depict posterior placentas.
Purpose: To highlight the role of ultrasound and MRI in diagnosis of placenta previa and placenta accreta.
Patients and methods: This is a prospective study includes fifty pregnant females with placental abnormalities regarding location and implantation. All patients underwent US (transabdominal and transvaginal approach) and MRI examination , and detailed assessment of placenta was performed .Operative findings were the gold standered for diagnosis all cases.
Results: The cases statistically evaluated in this study were gravid females with placenta previa at high risk of coexisting placenta adhesive disorders (22\50) .The sensitivity and specificity of US were 63.6% and 100% respectively while the sensitivity and specificity of MRI were 90.9% and 85.7% respectively in their ability to diagnose placental invasion.
Conclusion: MRI is complementery to ultrasound and it is important for accurate diagnosis of placenta previa and the seriously coexisting placenta accreta.