GND-PCA-Based Statistical Modeling of Diaphragm Motion Extracted from 4D MRI

Table 3

Leave-one-out method validation using regular PCA: mean and average of maximum error position (in mm).

Used PC	Regular PCA		GND-PCA
	Mean	Max	Mean	Max
1st PC	9.2	15.7	5.5	13.5
1st + 2nd PCs	6.5	17.3	2.4	8.1
1st–3rd PCs	6.3	17.2	1.3	5.5