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Table 2 Comparison of the spatial resolution of different preclinical PET scanners. Data are taken from [5,6,7,8,9,10,11,12,13,14,15]

From: NEMA characterization of the SAFIR prototype PET insert

System

Recon. method

Crystal size (\({\hbox {mm}}^{3}\))

FWHM (mm)a

R

T

A

SAFIR

FBP3DRP

\(2.1\times 2.1\times 13.0\)

2.77

1.89

2.83

SAFIR

MLEM

\(2.1\times 2.1\times 13.0\)

1.08

1.19

1.23

Hyperion IID

FBPb

\(0.93\times 0.93\times 12\)

1.7

1.8

1.4

NanoScan

SSRB FBP

\(1.1\times 1.1\times 13.0\)

1.50

1.32

0.91

MuPET

SSRB FBP

\(1.24\times 1.4\times 9.5\)

1.48

1.34

0.99

Inveon

FOREc + 2D FBP

\(1.5\times 1.5\times 10.0\)

1.6

1.6

2.3

IRIS

MLEM

\(1.6\times 1.6\times 12.0\)

1.05

1.05

1.25

ClearPET

3D FBP

\(2.0\times 2.0\times 10.0\)

1.94

2.00

3.24

Mosaic HP

FBP3DRP

\(2.0\times 2.0\times 10.0\)

2.32

2.32

2.64

LabPET 8TM

SSRB FBP

\(2.0\times 2.0\times 14.0\)

1.65

1.70

1.40

LabPET 8TM

2D MLEM

\(2.0\times 2.0\times 14.0\)

1.0

1.0

1.7

microPET R4

FOREbFBP

\(2.1\times 2.1\times 10.0\)

2.13

2.21

2.72

Xtrim-PET

SSRB FBP

\(2.1\times 2.1\times 10.0\)

2.01

1.95

1.74

Bruker

MLEM

\(50.0\times 50.0\times 10.0^{d}\)

0.87

0.78

0.77

  1. aFWHM at 5 mm radial offset in radial (R), tangential (T) and axial (A) directions.
  2. bHyperion IID reports a spatial resolution of 0.9 mm FWHM in three directions, calculated using a Gaussian fit, at the center of the scanner for the MLEM reconstruction [36].
  3. cFourier rebinning algorithm [37].
  4. dMonolithic crystals.