“…36 The technique used in the current fetal study is analogous to the 3D technology used in clinical studies on neonates, children, and adults. 25,33,34,[38][39][40][41][42] The electromagnetic position sensor system provided the freedom to make repeated adjustments in transducer position and angulation similar to conventional fetal echocardiographic visualization of ventricular morphology during 3D data acquisition. 24,32 Three-dimensional data acquisition was technically easy to perform; however, both the multiplanar and surface 3D reconstructions were limited by maternal abdominal and uterine wall artifacts, the quality and number of fetal acoustic windows, inadequate image resolution due to fetal movements during data acquisition, and mismatched fetal cardiac gating.…”