Prepared Activity [MBq]

Residual Activity [MBq]

Total Activity

[MBq]

Diluted volume [mL]

Activity concentration

[kBq/mL]

Actual hot sphere to background ratio

Syringe 1 Spheres

50.6

4.5

46.1

100

461

No background

Syringe 2 Background (16:1)

297

8.95

288.05

9482

30.38

15.2:1

Syringe 3 Background (8:1)

294

10.70

283.3 + 288.05 = 571.35

9482

60.26

7.65:1

Syringe 4 Background (4:1)

635.5

0

635.5 + 571.35 = 1207.3

9482

127.33

3.62:1