Table 1.

The mean errors of the Demons registrations related to the measured landmark displacements.

Mean error (mm)	P1→P5	P2→P5	P3→P5	P4→P5
X	0.73	0.80	0.68	0.55
Y	0.69	0.79	0.64	0.52
Z	0.80	0.92	1.14	0.91