Intra-placental twin pair: ultrasonographic mirror-ımage artifact

Abstract

During the routine antenatal ultrasound scan of a 28-year-old woman at 22 weeks’ gestation with a dichorionic diamniotic twin pregnancy, a “moving phantom fetus” was evident within the posterior placenta. It was concluded that the image was a mirror-image artifact with the freely floating inter-twin membrane between the amniotic sacs, comprising the reflective surface. The possibility of such phantom images during obstetric sonography should be considered.

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