Table 3.

Geometric evaluation for all VOIs and auto-segmentation approaches: mean values for DSC, HD, HD95 and MSD. All mean values have been calculated by averaging over all 12 patients. For a reference, we also include the inter-observer variability (IOV), derived from the manual contours of three different observers.

VOI	Approach	$\overline{DSC}$	$\overline{HD}$ (mm)	$\overline{HD95}$ (mm)	$\overline{MSD}$ (mm)
Right parotid	A	0.74  ±  0.04	15.07  ±  5.03	6.84  ±  1.95	2.24  ±  0.75
	B	0.80  ±  0.03	16.51  ±  6.96	5.65  ±  1.41	1.61  ±  0.43
	C	0.81  ±  0.02	13.33  ±  5.20	5.20  ±  0.97	1.56  ±  0.38
	IOV	0.84  ±  0.04	10.76  ±  4.35	4.97  ±  1.66	1.40  ±  0.45
Left parotid	A	0.77  ±  0.04	13.89  ±  5.36	5.84  ±  1.64	1.84  ±  0.54
	B	0.82  ±  0.03	15.00  ±  4.62	5.17  ±  1.62	1.47  ±  0.41
	C	0.83  ±  0.03	12.13  ±  3.91	4.63  ±  1.21	1.35  ±  0.40
	IOV	0.83  ±  0.04	10.94  ±  3.75	5.27  ±  1.76	1.59  ±  0.63
Spinal cord	A	0.71  ±  0.08	12.72  ±  3.91	7.68  ±  3.56	2.26  ±  1.10
	B	0.80  ±  0.05	10.12  ±  4.83	4.26  ±  1.36	1.24  ±  0.45
	C	0.80  ±  0.05	10.35  ±  3.75	4.39  ±  1.33	1.21  ±  0.44
	IOV	0.79  ±  0.07	7.12  ±  5.15	4.64  ±  3.06	1.55  ±  0.81
Mandible	A	0.64  ±  0.09	16.65  ±  3.60	6.96  ±  1.84	2.14  ±  0.60
	B	0.80  ±  0.04	13.33  ±  4.06	4.31  ±  1.05	1.10  ±  0.28
	C	0.80  ±  0.04	10.88  ±  2.07	4.44  ±  1.09	1.35  ±  0.30
	IOV	0.85  ±  0.04	8.94  ±  3.16	3.85  ±  1.56	0.92  ±  0.45