Table 1 Common SPECT acquisition and reconstruction parameters

Reconstruction algorithm

Filtered back-projection

OSCGM Flash 3D

Collimator

LEHR

SMARTZOOM

Energy window

140 keV ± 10%

140 keV ± 10%

Number of projections

62 views (31 per detector, 2 detectors)

34 views (17 per detector, 2 detectors)

Rotation range

180°

208°

Acquisition time (min)

20 (35 s per projection)

8 (25 s per projection)

Magnification

 × 1.45

 × 1.00

Rotation radius (cm)

25

28

Number of iterations

QGS 12

Number of subsets

QGS 5

Updates

20

Gaussian filter (mm)

7

Butterworth filter (Hz)

Butterworth order: 8; cut-off: 0.45

Matrix

64 × 64

128 × 128

Pixel size (mm)

6.6

4.8