Visual PSMA PET vPSG Score
| PSMA expression | Finding of MIP image |
|---|---|
| High | Most of lesions show higher uptake than parotid glands |
| Intermediate | Neither low nor high |
| Low | Most of lesions show lower uptake than parotid glands |
When assessing PSMA expression, 3 anteroposterior MIP images adjusted to 0–10, 0–20, and 0–30 SUV window range should be used. “Most of lesions” refers to 80% of extent (total area) of lesion (not number). If parotid glands show heterogeneous uptake, area showing lower uptake should be used as reference. When more than half of parotid glands are out of scan range, patient should not be evaluated with these criteria.