Table 2. Estimated fraction of organ irradiation for each scan type.
| Volume fraction irradiated (%) | |
| Bone marrow | 16.5 weighted as: |
| Mandible | 1.3 |
| Calvaria | 11.8 |
| Cervical spine | 3.4 |
| Thyroid | 100.0 |
| Oesophagus | 10.0 |
| Skin | 5.0 |
| Bone surface | 16.5 weighted as: |
| Mandible | 1.3 |
| Calvaria | 11.8 |
| Cervical spine | 3.4 |
| Salivary glands | 100.0 weighted as: |
| Parotid | 33.3 |
| Submandibular | 33.3 |
| Sublingual | 33.3 |
| Brain | 100.0 |
| Remainder | |
| Brain | 100.0 |
| Adipose | 5.0 |
| Connective tissue | 5.0 |
| Lymphatic nodes | 5.0 |
| Muscle | 5.0 |
| Extrathoracic airway | 100.0 |
| Pituitary | 100.0 |
| Eyes | 100.0 |