Multimodal Medical Image Registration Based on an Information-Theory Measure with Histogram Estimation of Continuous Image Representation

Table 3

Mean and standard deviations (Std.) of 20 registrations of the real 3D brain MR T1 and MR T2, MR T1 and MR PD, and MR T2 and MR PD images using three strategies (noise = 0.01). For each group of tests, the translations parameters in the -, -, and -axes were selected from the range 0–10 mm, and the rotations angles around the -, -, and -axes were selected from the range 0–10 degrees.

Datasets	Methods	Mean	Std.	Run time (s)
MR T1; and; MR T2	FCHE	(0.24, 0.31, 0.33, 0.41, 0.49, 0.43)		87
	CHE	(0.25, 0.32, 0.38, 0.43, 0.52, 0.46)		1236
	SH	(0.28, 0.37, 0.40, 0.48, 0.56, 0.47)		1.3
	PZW	(0.26, 0.32, 0.36, 0.46, 0.52, 0.45)		1.43
MR T1; and; MR PD	FCHE	(0.37, 0.35, 0.29, 0.47, 0.51, 0.50)		86
	CHE	(0.38, 0.36, 0.28, 0.49, 0.55, 0.53)		1203
	SH	(0.44, 0.41, 0.36, 0.54, 0.59, 0.54)		1.25
	PZW	(0.42, 0.39, 0.33, 0.52, 0.56, 0.55)		1.37
MR T2; and; MR PD	FCHE	(0.35, 0.33, 0.34, 0.38, 0.41, 0.45)		98
	CHE	(0.38, 0.36, 0.37, 0.42, 0.44, 0.46)		1329
	SH	(0.39, 0.42, 0.33, 0.46, 0.52, 0.53)		1.24
	PZW	(0.37, 0.39, 0.41, 0.41, 0.43, 0.48)		1.4