We found a low prevalence of SARS-CoV-2 (2.7% [5/188]) among pregnant and postpartum patients after initiating universal testing. Prevalence among symptomatic patients (22.2% [4/18]) was similar to initial targeted screening approaches (19.1% [8/42]). Among 170 asymptomatic patients, two were positive or inconclusive, respectively; repeat testing at 24 hours was negative.

The aim of this investigation was to compare the utility of three‐dimensional ultrasonography versus two‐dimensional ultrasonography in imaging the neonatal brain. Thirty patients in the neonatal intensive care unit underwent two‐dimensional and three‐dimensional ultrasonography. The resultant two‐ and three‐dimensional images recorded on film and three‐dimensional volumes (reviewed on a workstation) were evaluated independently. Comparable numbers of normal and abnormal studies were diagnosed by each modality. Axial images were considered useful in approximately 50% of three‐dimensional cases. Image quality, overall and in the far‐field, was rated higher on two‐dimensional images. Three‐dimensional sonographic acquisition time in the neonatal intensive care unit (1.7 min+/‐0.7 standard deviation) was significantly shorter than that for two‐dimensional sonography (9.0+/‐4.5 min). The total time for evaluation on the three‐dimensional workstation (4.4+/‐1.1 min) was significantly less than that for two‐dimensional images on film (10.6+/‐4.7 min). In conclusion, three‐dimensional ultrasonography is a promising, diagnostically accurate, and efficient imaging tool for evaluation of the neonatal brain; however, visualization must improve before it can replace two‐dimensional ultrasonography.

We used transvaginal three-dimensional ultrasonography to assess the first-trimester fetus and compared the findings with contemporaneous two-dimensional ultrasonographic studies. Multiplanar three-dimensional ultrasonography provided good visualization of fetal anatomy and allowed fetal measurement and assessment of nuchal translucency thickness. Three-dimensional ultrasonography required significantly less time to perform and to interpret than two-dimensional ultrasonography. Three-dimensional ultrasonography is an effective means of assessing the first-trimester fetus and offers potential advantages over two-dimensional ultrasonography.

The 3D US is subject to the same artifacts as two-dimensional (2D US) in terms of acoustic shadowing, although their presentation may be different. Awareness of this fact is essential for correct interpretation of 3D US studies. Three-dimensional scanning protocols should be modified to ensure that fetal structures are adequately visualized by acquiring volume data in more than one acquisition orientation.

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