TABLE 3

Root-Mean-Square Deviation Between SPECT/CT-Based and Nominal Absorbed Dose Distribution for Different Combinations of Updates and FWHMs

FWHM (voxels)	Updates	Cortex		Medulla		Whole kidney
FWHM (voxels)	Updates	No PVC	PETPVC	No PVC	PETPVC	No PVC	PETPVC
0	12	4.11	2.06	3.56	3.97	3.95	2.78
	24	3.68	1.88	3.77	3.97	3.71	2.69
	36	3.49	1.89	3.67	3.60	3.54	2.53
	48	3.36	2.04	3.53	3.58	3.41	2.61
	60	3.26	2.03	3.40	3.27	3.30	2.47
	96	3.06	2.12	3.06	2.26	3.06	2.17
	192	2.83	2.29	2.55	1.89	2.75	2.17
	384	2.81	2.77	2.12	1.14	2.62	2.39
	672	3.01	3.14	1.86	1.07	2.71	2.69
	960	3.28	3.74	1.78	0.82	2.91	3.15
2	12	4.30	1.80	3.32	3.67	4.03	2.52
	24	3.92	1.56	3.53	3.64	3.81	2.39
	36	3.74	1.48	3.47	3.34	3.66	2.22
	48	3.62	1.44	3.37	3.10	3.55	2.09
	60	3.53	1.44	3.28	2.97	3.46	2.03
	96	3.35	1.30	3.05	2.14	3.26	1.61
	192	3.07	1.50	2.73	1.19	2.98	1.41
	384	2.84	1.59	2.48	0.77	2.73	1.39
	672	2.71	1.63	2.30	0.58	2.59	1.40
	960	2.61	2.00	2.25	0.39^*	2.50	1.68
4	12	4.79	0.97	2.70	3.26	4.26	1.97
	24	4.55	0.94	2.87	2.93	4.11	1.80
	36	4.46	0.82	2.85	2.59	4.04	1.59
	48	4.41	0.79	2.80	2.38	3.99	1.47
	60	4.37	0.73	2.76	2.16	3.95	1.34
	96	4.31	0.72^*	2.66	1.70	3.88	1.11
	192	4.23	0.98	2.52	1.12	3.80	1.02^*
	384	4.17	1.24	2.43	0.73	3.73	1.11
	672	4.15	1.44	2.35	0.47	3.70	1.23
	960	4.10	1.55	2.35	0.41	3.66	1.31

↵* Best correlation to nominal dose.
Updates are iterations multiplied by subsets. The unit of the absorbed dose values is gray.