Table 4.

Summary of the overall heterogeneity index and the filtered heterogeneity index values for ^81mKrypton and Technegas for all reconstructions

	MEGP			LEGP
Heterogeneity Index (±SEM)	81mKrypton	Technegas	P value	81mKrypton	Technegas	P value
ACSC
Overall	1.03 ± 0.04	1.18 ± 0.07	0.006a	0.71 ± 0.03	1.24 ± 0.07	3·× 10−11a
2–4 cm	0.38 ± 0.02	0.55 ± 0.03	3·× 10−7a	0.19 ± 0.01	0.57 ± 0.04	1·× 10−15a
AC
Overall	0.98 ± 0.04	1.11 ± 0.06	0.009a	0.69 ± 0.03	1.17 ± 0.06	5·× 10−11a
2–4 cm	0.34 ± 0.02	0.51 ± 0.03	2·× 10−7a	0.18 ± 0.01	0.53 ± 0.03	2·× 10−15a
NAC
Overall	1.02 ± 0.04	1.08 ± 0.06	0.22	0.68 ± 0.02	1.12 ± 0.06	4·× 10−10a
2–4 cm	0.37 ± 0.02	0.50 ± 0.03	1·× 10−5a	0.19 ± 0.01	0.50 ± 0.03	2·× 10−15a

AC, attenuation correction; ACSC, attenuation and scatter correction; LEGP, low energy general purpose; MEGP, medium energy general purpose; (N)AC, (non)attenuation corrected; SC, scatter corrected.

^aIndicate the significant differences between ^81mKrypton and Technegas.