Table 2.

Quantitative analysis of SPECT-MRI fusion results by different methods

Case	Quality index	m1	m2	m3	m4	m5	m6
1	Bias	0.907	0.906	0.771	0.859	0.782	0.742
	FCC	0.695	0.696	0.671	0.699	0.513	0.782
	Qab/f	0.508	0.514	0.486	0.482	0.413	0.539
2	Bias	1.167	1.167	0.944	0.848	1.068	0.880
	FCC	0.734	0.734	0.663	0.727	0.571	0.763
	Qab/f	0.446	0.474	0.431	0.462	0.402	0.585
3	Bias	2.540	2.540	1.514	1.943	2.026	1.380
	FCc	0.330	0.330	0.290	0.320	0.213	0.405
	Qab/f	0.221	0.263	0.304	0.369	0.355	0.453
4	Bias	2.786	2.786	2.070	2.100	2.373	1.749
	FCC	0.339	0.339	0.303	0.410	0.210	0.499
	Qab/f	0.233	0.256	0.287	0.346	0.355	0.464
5	Bias	29.867	29.866	17.468	20.370	29.627	19.781
	FCC	0.488	0.488	0.428	0.563	0.370	0.744
	Qab/f	0.316	0.392	0.319	0.430	0.404	0.724

The best value of respective quality index is in bold entry