Nonrigid 3D Medical Image Registration and Fusion Based on Deformable Models

Table 4

Comparison: rigid registration versus elastic registration.

Image pair	𝜎𝑣	𝜎𝑠	𝜎𝑒
t07 → t09 (P1)	119.11	70.97	58.33
t20 → t05 (P1)	93.47	77.89	52.26
t12 → t20 (P1)	123.06	58.61	43.91
t09 → t13 (P2)	130.52	78.83	75.99
t07 → t05 (P2)	121.13	64.20	61.66
t11 → t08 (P2)	152.16	97.06	92.26
t16 → t01 (P2)	117.60	86.95	64.93
𝜎	122.43	76.36	64.19
Reduction of  𝜎		37.63%	47.57%
P		0.01

𝜎_𝑣: standard deviation before registration. 𝜎_𝑠: standard deviation after rigid registration. 𝜎_𝑒: standard deviation after elastic registration. P: two-sided significance of t-test for 𝜎_𝑠 versus 𝜎_𝑣 and 𝜎_𝑒 versus 𝜎_𝑣.