Number of Patients and Contours Included for Each Tissue Type in Population Pharmacokinetic Model
| Organ | Patients | Total regions in analysis | Available contours |
| Tumor | 29 | 226 | 86.9% |
| Parotid gland | 24 | 45 | 77.6% |
| Submandibular gland | 23 | 43 | 74.1% |
| Kidney | 29 | 57 | 98.3% |
| Liver | 27 | 27 | 93.1% |
| Spleen | 28 | 28 | 96.6% |
From initial cohort, only regions with satisfactory 3-dimensional spatial alignment at all imaging time points and normal-tissue regions free from tumor infiltration were considered reliable for analysis.