title: Magnetic resonance imaging and placenta previa.
abstract: Twenty-five women with diagnoses of placenta previa on ultrasound examination underwent magnetic resonance imaging examination. An assessment of placental position and the relationship of the lower placental edge to the internal os was made with both techniques and the results were compared. There was complete correlation of placental localization but significant differences were found in the determination of the degree of placenta previa. This occurred more often with posteriorly situated placentas. Magnetic resonance imaging directly affected management with regard to delivery in seven cases. Magnetic resonance imaging provides a technique capable of accurately assessing placental position and its relationship to the cervix, thereby leading to a reduction in hospitalization and inappropriate operations.
mesh_terms: D002584:Cervix Uteri / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D010920:Placenta / Q000473:pathology; D010923:Placenta Previa / Q000175:diagnosis* / Q000473:pathology; D011247:Pregnancy; D014463:Ultrasonography