Table 2:

Comparing the segmentation efficacy of CapsNets, UNets, and nnUNets in segmenting brain structures that were represented in the training data^{^a}

Brain Structure	CapsNet Dice (95% CI)	UNet Dice (95% CI)	nnUNet Dice (95% CI)	Repeated Measures ANOVA P Value^{^b}
Third ventricle	95% (94–96)	96% (95–97)	96% (95–97)	.03
Thalamus	94% (93–95)	95% (94–96)	94% (92–96)	.1
Hippocampus	92% (91–93)	93% (92–94)	92% (91–93)	.1

↵a The segmentation accuracy was quantified using Dice scores on the test set (114 brain MRIs). The third ventricle, thalamus, and hippocampus, respectively, represent easy, medium, and difficult structures to segment.
↵b df = 3 − 1 = 2.