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Recommended [18F]FDG PET/CTA interpretation criteria in LVV (Adapted from Slart et al. (16))
| LVV visual grading (GCA and TA) | ||
|---|---|---|
| [18F]FDG | Grade 0 | No vascular uptake (≤ mediastinum) |
| Grade 1 | Vascular uptake > mediastinum and < liver uptake | |
| Grade 2 | Vascular uptake = liver uptake, may be PET-positive | |
| Grade 3 | Vascular uptake > liver uptake, considered PET-positive | |
LVV large vessel vasculitis, GCA giant cell arteritis, TA Takayasu arteritis
