Table 2:

Similarity metrics (Dice Similarity Coefficient; Hausdorff Distance) for Prostate, Peripheral Zone, and Transition Zone between manual and automatic contours. Below: Similarity metrics for prostate, calculated separately for the three sections of the gland.

Volume of Interest	Matching Atlas and Scan Type	Dice Similarity Coefficient (mean±σ)	Hausdorff Distance (mm) (mean±σ)
Prostate	αGE_T2	0.81 ±0.15	2.7 ± 1.9
	αGE_T2FS	0.83 ±0.06	2.4 ±0.8
	αSiem_T2FS	0.79 ±0.14	2.9 ± 1.6
Peripheral Zone	αGE_T2	0.60 ±0.17	2.7 ± 1.4
	αGE_T2FS	0.59 ± 0.13	2.7 ± 1.0
	αSiem T2FS	0.54 ± 0.16	3.1 ± 1.5
Transition Zone	αGE_T2	0.74 ±0.17	3.1 ±2.2
	αGE_T2FS	0.75 ±0.09	2.9 ±0.9
	αSiem T2FS	0.70 ±0.14	3.6* ± 1.4
Base	αGE_T2	0.76 ±0.19	3.8 ±4.6
	αGE_T2FS	0.73 ±0.08	3.5 ± 1.2
	αSiem_T2FS	0.68 ±0.16	4.0 ± 1.8
Mid Gland	αGE_T2	0.87 ± 0.14	2.2 ± 1.9
	αGE_T2FS	0.90 ±0.05	1.8 ± 0.9
	αSiem T2FS	0.87 ± 0.15	2.2 ± 1.9
Apex	αGE_T2	0.79 ± 0.15	2.2 ± 1.3
	αGE_T2FS	0.83 ±0.07	1.9 ± 0.6
	αSiem_T2FS	0.79 ±0.16	2.0 ±0.9

^*Significantly different from aGE_T2FS, based on two-tailed Student’s t-test, p-value < 0.05.