EJNMMI Physics

Table 1 Reconstructed spatial resolution

From: Reconstructed spatial resolution and contrast recovery with Bayesian penalized likelihood reconstruction (Q.Clear) for FDG-PET compared to time-of-flight (TOF) with point spread function (PSF)

	Mean ± SD
SBR 8:1
Q.Clear₁₅₀	3.7 ± 0.2
Q.Clear₃₀₀	4.3 ± 0.2
Q.Clear₄₅₀	4.7 ± 0.2
PSF+TOF_4/16		4.2 ± 0.2
PSF+TOF_2/17		5.1 ± 0.2
PSF+TOF_4/8		7.0 ± 0.2
OSEM+TOF_4/16			4.8 ± 0.2
OSEM+TOF_2/17			5.2 ± 0.3
OSEM+TOF_2/8			8.2 ± 0.2
SBR 4:1
Q.Clear₁₅₀	4.4 ± 0.6
Q.Clear₃₀₀	5.0 ± 0.5
Q.Clear₄₅₀	5.6 ± 0.4
PSF+TOF_4/16		4.7 ± 0.2
PSF+TOF_2/17		5.7 ± 0.6
PSF+TOF_4/8		7.5 ± 0.4
OSEM+TOF_4/16			5.1 ± 0.3
OSEM+TOF_2/17			5.8 ± 0.7
OSEM+TOF_2/8			8.8 ± 0.3
SBR 2:1
Q.Clear₁₅₀	5.1 ± 0.7
Q.Clear₃₀₀	5.9 ± 0.8
Q.Clear₄₅₀	6.4 ± 0.6
PSF+TOF_4/16		5.1 ± 0.5
PSF+TOF_2/17		6.2 ± 0.7
PSF+TOF_4/8		7.6 ± 0.5
OSEM+TOF_4/16			5.4 ± 0.7
OSEM+TOF_2/17			6.0 ± 0.9
OSEM+TOF_2/8			9.2 ± 0.6

Mean ± SD of the reconstructed spatial resolution (FWHM) for the three largest spheres is displayed (i.e., diameter of 22, 28, and 37 mm). Increasing SD mirror increasing noise with decreasing SBR

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