title: Placental localization: a comparison of isotopic and ultrasonic placentography.
mesh_terms: D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007204:Indium; D010920:Placenta; D010923:Placenta Previa / Q000175:diagnosis*; D011247:Pregnancy; D011877:Radionuclide Imaging; D014463:Ultrasonography
chemical_list: D007204:Indium