Anatomic reference points for CT imaging modalities
| Vertebral level | Further specification | Studies, n |
| L3 axial slice | 9 | |
| Not specified | 6 | |
| Superior aspect | 2 | |
| Inferior aspect | 1 | |
| L3-L4 disc | 1 | |
| Superior aspect | 1 | |
| L4 | 4 | |
| Not specified | 1 | |
| Inferior aspect | 3 | |
| L4-L5 disc | 1 | |
| Not specified | 1 | |
| Other | 2 | |
| Superior orbital rim, external meatus, mandibular coronoid process | 1 | |
| 2 cm below zygomatic arch | 1 | |