TABLE 1

Diagnostic Value of Attenuation Correction Systems

Author	System	n	Sensitivity (%)		Specificity (%)		Normalcy (%)
Author	System	n	NC	AC	NC	AC	NC	AC
Ficaro	U Mich	119	78	84	48	82	88	98
Hendel	ADAC	200	76	78	44	50	86	96
Links*	SMV	112	84	88	69	92	69	92
Gerson**	Picker	113	85	90	NA	NA	72	70
Gallowitsch	Elscint	49	89	94	69	84	NA	NA
Lenzo**	Siemens	171	93	93	84	88	78	85
Composite		764	81	85	64	81	80	89

NC = Non–attenuation-corrected SPECT; AC = attenuation-corrected SPECT; NA = not available.
↵* Includes motion correction and depth-dependent blur correction.
↵** Includes scatter correction.