الفهرس 
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Abstract
The prevalence of PA is increasing, and practitioners should be aware of this entity and its imaging features. Placenta previa and a prior history of cesarean section are the most significant risk factors for PA. The present study is a prospective study done at the radiology department in Mansoura University Hospitals (MUH) including (35) pregnant ladies diagnosed as placenta previa. Their ages ranged from (20-39 years). The patients referred from Obstetrics & Gynecology Department and Outpatient Clinic for assessment of possibility and degree of accretion. All patients were suspected to ultrasound, Doppler and non-contrast MRI examinations, using a diagnostic ultrasound scanners (Logic p5 2012 device) and 1.5 T system (Magnetom symphony, Siemens, Version VA 12 A) both are present at radiology department in Mansoura University Hospitals (MUH). The study was performed in the period from May 2019 to May 2020 following the institutional research board approval. Surgical planning was done after analysis of US and MRI findings to confirm the diagnosis. 35 patients underwent cesarean delivery by Obstetrics & Gynecology surgical team at MUH. Correlation between US, MRI findings and surgical data was done and statistically evaluated. Our study demonstrates that as the composite score derived from combining US and MRI findings increases, so does the risk of invasive placentation. Specifically, the probability of invasive placental disease also increases with an increasing MRI score. A composite score greater than 6 confers significant concern for disease.