Comparison of Imaging Characteristics of ¹²⁴I PET for Determination of Optimal Energy Window on the Siemens Inveon PET

Table 3

Recovery coefficients and %SD values for 5 different rods.

Rod diameter (mm)	2		3		4		5
	RC^†	%SD^‡	RC	%SD	RC	%SD	RC	%SD
FBP
350~550	0.23	32.90	0.36	44.09	0.53	50.20	0.64	65.26
350~600	0.24	29.89	0.39	40.54	0.50	46.35	0.62	63.38
350~625	0.27	33.43	0.40	45.78	0.52	47.42	0.62	62.90
350~650	0.27	31.06	0.38	42.24	0.49	46.74	0.63	62.11
350~675	0.22	27.41	0.38	42.26	0.60	45.78	0.60	61.49
350~700	0.25	28.95	0.40	41.27	0.57	46.76	0.67	61.51
350~725	0.26	30.60	0.37	40.65	0.52	47.11	0.65	62.01
350~750	0.27	31.20	0.41	44.30	0.54	46.57	0.67	61.64
350~775	0.24	29.34	0.41	41.95	0.57	47.07	0.65	62.14
350~800	0.23	25.71	0.41	41.56	0.55	46.94	0.68	62.98
400~590	0.24	32.66	0.37	43.36	0.49	49.37	0.66	66.94

For ¹²⁴I PET, RC could not be calculated for a 1 mm rod size, because this rod was not discernible by ¹²⁴I PET.
RC: recovery coefficient.
%SD: percent standard deviation.