The use of inversion mode and 3D manual segmentation in volume measurement of fetal fluid-filled structures: comparison with Virtual Organ Computer-aided AnaLysis (VOCAL™).

The article examines the intermethod, and inter- and intraobserver agreements for volumetric measurements of fetal fluid-filled structures performed using Virtual Organ Computer-aided AnaLysis (VOCAL), inversion mode and manual segmentation. It proposes an alternative, simpler method for obtaining volume measurements from 3D datasets. It also compares the time required to complete the volume measurements by each method.