TABLE 5.

Translation and Rotation Registration Accuracy for Intrasubject Coregistration Comparing Constrained Versus Unconstrained Scaling, for Mutual Information Minimization

Study type	Constrained scaling		Scaling free
Study type	Δ_tot (pixels)	Φ_tot (degrees)	Δ_tot (pixels)	Φ_tot (degrees)
[^99mTc]ECD	0.90 (0.26)	0.92 (0.25)	0.89 (0.25)	0.88 (0.31)
[¹²³I]IBZM	1.01 (0.12)	0.92 (0.37)	1.01 (0.13)	0.83 (0.31)
[¹²³I]β-CIT	0.78 (0.33)	1.44 (0.62)	0.78 (0.36)	2.33 (2.01)*
[¹²³I]R91150	0.89 (0.28)	0.86 (0.28)	0.90 (0.27)	0.99 (0.30)
TCT	0.89 (0.29)	0.92 (0.21)	0.92 (0.31)	0.93 (0.31)

↵* P < 0.05.
All values are expressed as mean (SD).