TABLE 2

Results of Phantom Study for an ¹⁸F-FDG Concentration of 53 kBq /mL (n = 5)

		Sphere size (mm)
Acquisition time	Parameter	10	13	17	22	28	37
15 min		25,405	40,098	50,275	52,466	53,638	53,692
3 min	Mean (Bq/mL)	24,690	40,029	50,169	52,657	54,687	54,788
	SD	777	804	1301	1048	1254	627
	CV	3.15	2.01	2.59	1.99	2.29	1.14
1 min	Mean (Bq/mL)	23,591	38,981	50,515	52,674	55,621	56,965
	SD	1,339	2,207	2,064	687	741	340
	CV	5.68	5.66	4.09	1.30	1.33	0.60
	%Dif-index^*	−4.45	−2.62	0.69	0.03	1.71	3.97
30 s	Mean (Bq/mL)	20,859	39,076	50,331	54,196	57,462	59,467
	SD	1,422	2,380	2,165	1,296	1,156	1,264
	CV	6.82	6.09	4.30	2.39	2.01	2.13
	%Dif-index^*	−15.52	−2.38	0.32	2.92	5.07	8.54
15 s	Mean (Bq/mL)	16,346	37,668	50,078	55,989	58,993	62,000
	SD	2,900	3,210	4,167	2,930	3,451	2,054
	CV	17.74	8.52	8.32	5.23	5.85	3.31
	%Dif-index^*	−33.79	−5.90	−0.18	6.33	7.87	13.16

↵* %Dif-index = percentage difference compared with 3-min acquisition.