SUVmax of IgG4-RD Involvement in 68Ga-FAPI and 18F-FDG PET/CT
| Involved organ | 68Ga-FAPI | 18F-FDG | P |
| Lacrimal gland | 4.81 ± 1.64 | 5.64 ± 4.10 | 0.433 |
| Salivary gland | 8.26 ± 3.90 | 4.88 ± 1.90 | 0.0008* |
| Lung/pleura | 6.69 ± 7.21 | 4.33 ± 2.56 | 0.196 |
| Pancreas | 15.22 ± 8.99 | 4.19 ± 2.52 | <0.0001* |
| Bile duct/liver | 9.42 ± 4.36 | 4.58 ± 2.08 | 0.0081* |
| Periaortitis/retroperitoneal fibrosis | 8.71 ± 4.04 | 6.11 ± 2.45 | 0.157 |
| Kidney | 9.44 ± 6.67 | 4.02 ± 1.58 | 0.106 |
| Prostate/seminal vesicle | 6.38 ± 2.16 | 7.30 ± 2.90 | 0.450 |
| Lymph node | 1.61 ± 0.76 | 6.37 ± 1.72 | <0.0001* |
↵* Difference of SUVmax between 68Ga-FAPI and 18F-FDG is significant.