Detectability of 68Ga-FAPI and 18F-FDG PET/CT in IgG4-RD
| Involved organ | 68Ga-FAPI | 18F-FDG | P |
| Lacrimal gland | 14/14 (100%) | 10/14 (71.4%) | 0.125 |
| Salivary gland | 19/19 (100%) | 18/19 (94.7%) | 1.0 |
| Lung/pleura | 10/11 (90.9%) | 10/11 (90.9%) | 1.0 |
| Pancreas | 19/19 (100%) | 11/19 (57.9%) | 0.0078* |
| Bile duct/liver | 6/6 (100%) | 4/6 (66.7%) | 0.480 |
| Periaortitis/retroperitoneal fibrosis | 7/7 (100%) | 7/7 (100%) | 1.0 |
| Kidney | 4/5 (80.0%) | 4/5 (80.0%) | 1.0 |
| Prostate/seminal vesicle | 10/10 (100%) | 10/10 (100%) | 1.0 |
| Lymph node | 0/16 (0%) | 16/16 (100%) | <0.0001* |
↵* Difference in positive rate between 68Ga-FAPI and 18F-FDG is significant.