Table 1.

The average uptake Am, recovery coefficient, and contrast recovery determined from 6 hot spheres.

Sphere	OSEM			TOF
	Am (Bq/mL)	RC (%)	CR (%)	Am (Bq/mL)	RC (%)	CR (%)
10 mm	4.34 ± 0.25	40.0 ± 1.9	35.5 ± 1.88	5.31 ± 0.25	50.3 ± 1.90	43.4 ± 1.17
13 mm	6.00 ± 0.34	60.0 ± 2.5	49.2 ± 2.26	7.15 ± 0.10	64.3 ± 0.70	58.4 ± 1.20
17 mm	7.04 ± 0.42	60.0 ± 3.2	57.7 ± 2.00	8.16 ± 0.17	72.0 ± 1.30	66.7 ± 1.33
22 mm	7.89 ± 0.32	70.0 ± 2.4	64.7 ± 1.32	8.62 ± 0.34	75.5 ± 2.60	70.4 ± 1.60
28 mm	9.29 ± 0.26	80.0 ± 2.0	76.1 ± 0.19	9.70 ± 0.24	83.7 ± 1.80	79.3 ± 0.49
37 mm	10.00 ± 0.24	90.0 ± 1.8	82.0 ± 0.40	10.22 ± 0.25	87.7 ± 1.90	83.6 ± 0.34

	TOF-PSF			Q.Clear
	Am (Bq/mL)	RC (%)	CR (%)	Am (Bq/mL)	RC (%)	CR (%)
10 mm	5.66 ± 0.17	50.0 ± 1.30	46.1 ± 0.70	6.80 ± 0.45	59.0 ± 1.40	53.2 ± 1.89
13 mm	7.73 ± 0.16	70.0 ± 1.20	63.0 ± 1.04	9.04 ± 0.13	79.0 ± 1.00	74.4 ± 0.59
17 mm	8.69 ± 0.19	70.0 ± 1.50	70.6 ± 1.32	9.57 ± 0.42	82.0 ± 1.20	78.7 ± 1.77
22 mm	8.80 ± 0.34	73.9 ± 2.60	71.7 ± 1.43	9.49 ± 0.21	83.0 ± 1.60	78.0 ± 0.54
28 mm	9.76 ± 0.23	82.8 ± 1.80	79.5 ± 0.66	10.76 ± 0.21	91.7 ± 1.60	88.5 ± 0.78
37 mm	10.45 ± 0.26	87.4 ± 1.90	85.2 ± 0.15	10.92 ± 0.24	92.9 ± 1.80	89.8 ± 0.52