Comparison of Activity Within Circular ROIs for Emission Images Reconstructed Using Attenuation Maps with Different Combinations of Corrections
| Cylinder-study activity (MBq) | Rodent-study activity (MBq) | |||
|---|---|---|---|---|
| Type of correction | 68Ge | 57Co | 68Ge | 57Co |
| Both emission contamination and attenuation | 1.03 | 1.02 | 5.84 | 5.94 |
| Only emission contamination | 0.84 | 0.88 | 5.20 | 5.53 |
| None | 0.66 | 0.87 | 4.20 | 5.26 |
Based on well-counter measurements, we estimate that approximately 0.9 and 6.0 MBq of activity were present within ROIs for cylinder and rodent studies, respectively.