Table 1.

Conversion coefficient of collimators: European vs. Japanese studies

	Europe			Japan*			P values between Europe and Japan
	N	Mean	SD	N	Mean	SD
LEHR	103	0.553	0.018	73	0.552	0.048	0.85
LEGP+LEAP group**	10	0.591	0.024	25	0.648	0.036	<0.0001
LEGP	4	0.570	0.011	17	0.654	0.037	0.0003
LEAP	6	0.605	0.020	2	0.624	0.014	0.15
LMEGP	16	0.824	0.035	46	0.829	0.055	0.74
MEGP+MELP group	81	0.891	0.025	53	0.895	0.061	0.60
MEGP***	28	0.882	0.017	40	0.878	0.054	0.71
MELP	53	0.895	0.027	13	0.950	0.051	<0.0001

*Data from J Nucl Cardiol 2014; 21: 970–978

**LE general-all-purpose collimator is included in Japanese study

*** MEGP, ME general-all purpose, and ME collimators are included in Japanese study