Table 1 SPECT/CT systems and setups used in the comparison exercise

S1

Siemens

Symbia T2

2

9.5 mm

Siemens e-soft

TEW^a

Yes

S2a

General Electric

Discovery 670

16

9.5 mm

GE Xeleris

TEW^a

Yes

S2b

General Electric

Discovery 670

16

9.5 mm

Hermes

Monte Carlo^b

Yes (Monte Carlo)

S2c

General Electric

Discovery 670

16

9.5 mm

Hermes

Monte Carlo^b

Yes

S2d

General Electric

Discovery 670

16

9.5 mm

Hermes

TEW^a

Yes

S3

General Electric

Discovery 670

16

15.9 mm

In-house

ESSE^c

Yes

S4

General Electric

Discovery 670

16

9.5 mm

GE Xeleris

TEW^a

Yes

S5

General Electric

Optima NM/CT 640

4

9.5 mm

GE Xeleris

TEW^a

Yes

S6

General Electric

Optima NM/CT 640

4

9.5 mm

Hermes

TEW^a

Yes

S7

Siemens

Symbia Intevo Bold

16

9.5 mm

Siemens e-soft

TEW^a

Yes

S8

Siemens

Symbia T2

2

15.9 mm

Siemens e-soft

TEW^a

Yes