TABLE 2

Spatial Resolution Results

		FWHM/FWTM (mm) at axial center of FOV			FWHM/FWTM (mm) at ¼ axial offset
System energy window reconstruction	Radial offset (mm)	Radial	Tangential	Axial	Radial	Tangential	Axial
microPET P4, 350–650 keV, Fourier rebinning + 2D FBP	5	2.29/4.03	2.18/3.81	2.20/4.52	2.34/4.22	2.14/3.77	1.75/4.22
	10	2.41/4.23	2.23/3.92	2.38/4.66	2.37/4.14	2.22/3.84	1.97/4.49
	15	2.42/4.19	2.28/3.83	2.42/4.68	2.39/4.16	2.27/3.87	2.04/4.53
	25	2.61/4.67	2.25/3.76	2.42/4.67	2.53/4.41	2.30/3.91	2.07/4.50
	50	3.27/6.40	2.40/4.10	2.58/5.09	3.20/6.08	2.45/4.29	2.30/4.74
	75	3.92/8.07	2.64/4.53	2.88/5.99	3.78/7.12	2.81/5.15	2.72/5.58
microPET R4, 350–650 keV, Fourier rebinning + 2D FBP	5	2.13/4.90	2.21/4.22	2.72/5.59	2.06/5.24	2.18/4.14	2.37/4.88
	10	2.30/4.60	2.31/4.36	3.02/6.54	2.30/4.61	2.29/4.39	2.66/5.31
	15	2.86/5.38	2.39/4.57	3.25/7.48	2.63/5.35	2.35/4.40	2.84/5.71
	25	3.30/6.32	2.51/4.66	3.27/7.57	3.31/6.23	2.53/4.80	3.09/6.31
microPET Focus 120, 350–650 keV, Fourier rebinning + 2D FBP	5	1.92/3.66	1.66/3.06	1.90/3.81	1.92/3.63	1.65/3.09	1.62/3.28
	10	1.88/3.95	1.74/3.22	1.94/3.91	1.83/3.69	1.76/3.28	1.66/3.34
	15	1.99/4.02	1.72/3.11	1.98/4.05	1.94/3.75	1.77/3.22	1.69/3.41
	25	2.53/4.84	1.73/3.01	2.05/4.34	2.45/4.49	1.80/3.20	1.81/3.67
microPET Focus 220, 250–750 keV, Fourier rebinning + 2D FBP	5	1.75	1.80	1.70	1.70	1.70	1.73
	10	1.68	1.78	1.73	1.66	1.79	1.75
	15	1.82	1.71	1.80	1.88	1.72	1.78
	25	2.07	1.69	1.84	2.09	1.74	1.87
	50	2.88	1.77	1.98	2.82	1.82	1.92
	75	4.08	1.90	2.16	3.92	1.90	2.11
Inveon, 350–625 keV, Fourier rebinning + 2D FBP	5	1.63/3.36	1.62/3.15	2.45/5.62	1.66/3.32	1.63/3.14	1.97/4.20
	10	1.80/3.84	1.58/2.91	2.40/5.51	1.72/3.40	1.64/3.18	2.12/4.44
	15	2.03/4.32	1.56/2.78	2.29/5.32	1.87/3.69	1.63/3.05	2.17/4.72
	25	2.49/5.17	1.61/2.86	2.09/4.67	2.38/4.76	1.65/2.97	2.06/4.54
ClearPET, 250–650 keV, 3D FBP	5	1.94/3.76	2.00/4.17	3.24/6.05	2.18/4.05	1.97/3.92	3.18/5.91
	10	1.85/3.47	2.27/5.97	3.19/5.97	1.87/3.68	2.14/4.86	3.20/5.88
	15	2.01/3.62	2.43/5.53	3.20/5.96	2.05/3.84	2.33/5.25	3.19/5.83
	25	2.55/4.28	2.42/5.69	3.21/5.97	2.50/4.18	2.43/6.59	3.19/5.85
Mosaic HP, 385–665 keV, 3D Fourier reprojection	5	2.32/5.30	2.32/4.97	2.64/6.07	2.33/5.32	2.40/4.88	2.48/5.32
	10	2.45/5.48	2.51/4.96	2.82/6.14	2.37/5.54	2.49/4.97	2.80/5.89
	15	2.43/5.44	2.65/5.24	2.79/6.28	2.48/5.62	2.63/5.25	2.80/5.92
	25	2.59/5.93	2.83/5.25	2.96/6.28	2.63/5.81	2.87/5.31	3.10/6.30
Argus, 250–700 keV, 2D FBP	5	1.63	1.65		1.65	1.70
	10	1.71	1.70			1.74	1.75
	15	1.85	1.70		1.85	1.75
	25	2.25	1.73		2.15	1.85
VrPET, 100–700 keV, SSRB + 2D FBP	5	1.52/2.76	1.62/2.99	2.66/4.81	1.62/2.95	1.68/2.86	2.57/5.21
	10	1.58/2.85	1.68/3.02	3.03/5.45	1.54/2.89	1.68/3.07	3.11/5.45
	15	1.78/3.25	1.51/2.79	3.11/5.50	1.69/3.09	1.73/3.14	3.22/5.72
	25	2.03/3.69	2.12/3.72	3.32/5.92	1.79/3.29	1.98/3.60	3.60/6.87
LabPET 8, 250–650 keV, SSRB + 2D FBP	5	1.65/3.40	1.70/3.30	^*	1.57/3.30	1.65/3.50	^*
	10	1.91/3.60	1.82/3.67	^*	1.92/3.40	1.74/3.45	^*
	15	2.01/4.10	1.83/3.70	^*	1.92/3.77	1.86/3.90	^*
	25	2.56/4.65	1.90/4.28	^*	2.55/4.70	1.93/4.30	^*

↵* Axial intrinsic resolution (FWHM/FWTM) = 1.4/4.3 mm.