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Table 2 Resolution in water (FWHM) in x and y direction for three line sources (~ 23 MBq) in water. Three measurements were executed; first with no activity concentration in water (no background [BG]), second with background activity concentration of 0.1% of activity in the line sources (0.1% BG), and third with background activity concentration of 1.0% of activity in the line sources (1.0% BG)

From: Performance evaluation of a novel brain-dedicated SPECT system

 

FWHM line source 1 [mm]

FWHM line source 2 [mm]

FWHM line source 3 [mm]

Activity

22.3 MBq

22.6 MBq

24.4 MBq

Location

5 cm left from source 3

5 cm above source 3

Center FOV

Clinical reconstruction algorithm no BG

X: 8.11 ± 0.25

Y: 8.84 ± 0.28

X: 8.22 ± 0.03

Y: 7.62 ± 0.07

X: 6.18 ± 0.16

Y: 7.57 ± 0.19

Clinical reconstruction algorithm 0.1% BG

X: 9.28 ± 0.10

Y: 7.40 ± 0.09

X: 7.04 ± 0.04

Y: 9.21 ± 0.02

X: 6.21 ± 0.15

Y: 6.05 ± 0.09

Clinical reconstruction algorithm 1.0% BG

X: 9.34 ± 0.21

Y: 8.33 ± 0.50

X: 8.35 ± 0.55

Y: 10.60 ± 0.13

X: 9.48 ± 0.91

Y: 8.45 ± 0.76

Research reconstruction algorithm no BG

X: 7.53 ± 0.16

Y: 7.98 ± 0.22

X: 7.68 ± 0.05

Y: 6.94 ± 0.10

X: 5.74 ± 0.25

Y: 6.77 ± 0.10

Research reconstruction algorithm 0.1% BG

X: 8.95 ± 0.14

Y: 7.55 ± 0.11

X: 7.54 ± 0.02

Y: 9.16 ± 0.01

X: 6.79 ± 0.07

Y: 7.21 ± 0.08

Research reconstruction algorithm 1.0% BG

X: 8.07 ± 0.18

Y: 6.77 ± 0.45

X: 6.72 ± 0.37

Y: 8.27 ± 0.35

X: 7.54 ± 1.11

Y: 7.16 ± 0.67