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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