Accuracy of ultrasonography in diagnosis of fetal central nervous system malformation

Table 1 Comparison of image quality scores between two-dimensional ultrasonography and three-dimensional ultrasonography (mean ± SD, points)

Group	Number	Sulcus, fissure, and gyrus display	Choroid plexus ependymal display	Blood flow display	Tissue specificity	Resolution	Visual field	Positioning
Two-dimensional ultrasonography	113	2.53 ± 0.34	2.49 ± 0.23	2.38 ± 0.30	2.44 ± 0.25	2.59 ± 0.18	2.63 ± 0.21	2.85 ± 0.12
Three-dimensional ultrasonography	113	1.97 ± 0.30	2.12 ± 0.25	1.98 ± 0.26	2.03 ± 0.20	2.31 ± 0.22	2.25 ± 0.19	2.61 ± 0.14
t		13.129	11.578	10.711	13.613	10.471	14.264	13.836
P value		0.000	0.000	0.000	0.000	0.000	0.000	0.000