Table 4.

Effect of DA with random elastic deformations on CNN‐SP‐D when using either 25% (12 training subjects per cross‐validation fold) or 100% (48 training subjects per cross‐validation subjects) of the available training data for the hippocampus segmentation experiment

		Dice (%)	MHD (mm)
25%	CNN‐SP‐D	90.0 (2.9)	0.28 (0.10)
	CNN‐SP‐D + DA	91.1 (2.1)	0.24 (0.08)
100%	CNN‐SP‐D	91.9 (1.9)	0.21 (0.07)
	CNN‐SP‐D + DA	92.1 (1.9)	0.21 (0.07)

Note: Mean Dice and MHD values over both left and right hippocampi are reported, with SDs in parentheses.

Abbreviations: DA, data augmentation; CNN‐SP, CNN with spatial priors; MHD, modified Hausdorff distance.