OP16.04: An investigation of the relationship between MRI and ultrasound derived measurements of fetal head descent

Abstract

Objectives: The purpose of this presentation is to describe the use of 3D volume-slice in prenatal diagnosis. Conventional 3D multislice allows simultaneous display of multiple sequential parallel planes while in 3D volume slice it is multiple sequential 3D or 4D rendered volumes that are simultaneous displayed on the screen. The render line offset distance between sequential images can be set from a minimum of 1 mm to a maximum of 5 mm and each volume displayed on the monitor can be rendered separately. In other words up to 7 volumes can be rendered using different algorithms and visualized side by side at the same time. Methods: Volume data were acquired prospectively from the mid-sagittal plane of the fetal spine and face in 15 fetuses at the second and third trimester. All volumes were acquired with Accuvix V20 (Medison) using 4–8 MHz transabdominal curved array mechanically driven probe. Results: The following information was able to be obtained from all volumes obtained (Number of ribs, anterior vertebral bodies, both nasal bones, the metopic suture) Conclusion: 3D volume-slice is a promising new tool in the visualization and analysis of fetal bony structures.