Table 5.

Comparison of manual and computer segmentation on different planes.

	Area difference (%)	Dice	Avg dist error (mm)	Max dist error (mm)
Sagittal
Manual versus registration	$12.2\pm 3.1$	$93.1\pm 1.6$	$3.2\pm 0.6$	$13.1\pm 3.9$
Manual versus HNN	$-\mathbf{1.1}\pm \mathbf{3.7}$	$\mathbf{97.2}\pm \mathbf{1.3}$	$\mathbf{1.3}\pm \mathbf{0.4}$	$\mathbf{5.6}\pm \mathbf{2.9}$
Obs 1 versus Obs 2	$5.0\pm 3.2$	$95.9\pm 1.8$	$1.7\pm 0.6$	$6.0\pm 3.6$
Coronal
Manual versus registration w/heart	$8.3\pm 10.1$	$93.5\pm 4.2$	$3.9\pm 1.9$	$16.6\pm 10.3$
Manual versus HNN w/heart	$-\mathbf{4.2}\pm \mathbf{10.8}$	$\mathbf{96.1}\pm \mathbf{3.8}$	$2.3\pm 1.8$	$\mathbf{12.2}\pm \mathbf{11.3}$
Manual versus HNN w/o heart	$-5.2\pm 7.9$	$93.3\pm 2.7$	$\mathbf{2.1}\pm \mathbf{1.0}$	$13.3\pm 6.6$
Axial
Manual versus registration w/heart	$3.8\pm 3.7$	$95.6\pm 1.8$	$2.3\pm 0.8$	$9.2\pm 4.0$
Manual versus HNN w/heart	$-\mathbf{2.7}\pm \mathbf{3.9}$	$\mathbf{96.6}\pm \mathbf{1.7}$	$\mathbf{1.8}\pm \mathbf{0.7}$	$\mathbf{6.5}\pm \mathbf{3.2}$
Manual versus HNN w/o heart	$-2.7\pm 8.1$	$93.3\pm 3.1$	$2.2\pm 0.8$	$11.7\pm 5.7$

Note: Bold values are the best performer in each category.