TABLE 1.

Spatial Resolution of ²²Na Point Source Measured with Filtered Backprojection

Axial position	Radial off-center position (cm)	Full width at half maximum (mm)
Axial position	Radial off-center position (cm)	Radial	Tangential	Axial
½ AFOV	1	1.63	1.68	2.55
	10	2.10	2.06	2.97
	20	2.17	2.87	2.82
⅛ AFOV	1	1.76	1.47	2.91
	10	1.99	2.08	2.80
	20	2.20	2.78	3.05