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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