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Table 1 NEMA phantom initial activity distribution

From: Quantitative SPECT (QSPECT) at high count rates with contemporary SPECT/CT systems

Compartment

Volume (mL)

System A

Systems B and C

Activity (GBq)

Activity concentration (MBq/mL)

Activity (GBq)

Activity concentration (MBq/mL)

Large saline bag

500

12.0

24.0

11.0

22.0

Small saline bag

250

1.20

4.81

1.24

4.95

Large sphere

26.5

0.66

24.7

0.54

22.0

Small sphere

11.5

0.31

27.0

0.23

22.0

Cylinder

355

0.0

0.0

0.0

0.0

Remainder of D-shaped compartment

8557

4.12

0.48

3.94

0.46

Whole phantom

9700

18.3

1.89

17.0

1.76