HDlive in the assessment of twin pregnancy

Abstract

HDlive is a new surface-rendering mode incorporated into an ultrasound machine, which uses an adjustable light source that facilitates the ability to create lighting and shadowing effects, thereby increasing depth perception and improving image clarity. HDlive can provide clearer twin fetal images than conventional three-dimensional ultrasound. Moreover, we can clearly and easily recognize exact and precise inter-twin contacts using HDlive compared to conventional four-dimensional ultrasound. HDlive is an accurate and reliable modality for the assessment of fetal inter-twin contacts or intra-pair stimulations in twin pregnancies. In this chapter, we discuss the latest topics regarding twin fetal development, inter-twin contact and intra-pair stimulation, and twin activity level and later temperament using HDlive. HDlive may become an important technique in future behavioral research on twins and the antenatal evaluation of abnormal twin pregnancies.