Peak Counting Rates for NU 2-1994 and NU 2-2001 Standards
| Acquisition mode | Standard | Peak NEC rate (kcps) | Activity concentration at peak NEC (kBq/mL) | Peak true rate (kcps) | Activity concentration at peak trues (kBq/mL) |
|---|---|---|---|---|---|
| 2D* | NU 2-1994 | 261 | 152 | 557 | 267 |
| 2D† | NU 2-2001 | 125 | 58 | 189 | 58 |
| 3D | NU 2-1994 | 146 | 24 | 449 | 53 |
| 3D | NU 2-2001 | 19.2 | 7.15 | 109 | 19.7 |
↵* Data from (16).
↵† Results were not at peak NEC or peak true rates because there was insufficient activity in source to measure these peak rates.
Data were acquired on GE Advance scanner. As point of reference, typical average activity concentration seen in clinical FDG study is 3–4 kBq/mL, for 370-MBq injection in 70-kg patient after 1-h uptake period.