| Symptom/Sign | Number | Clinically relevant positive scan yield (%) |
|---|---|---|
| Focal signs | 21 | 12 (57) |
| focal neurology in the absence of seizure activity | 13 | 6 (46) |
| focal seizures | 8 | 4 (50) |
| Headache | 19 | 4 (21) |
| Seizures | 14 | 4 (29) |
| generalised seizures | 6 | 0 |
| Decreased/fluctuant GCS | 12 | 5 (42) |
| Papilloedema | 6 | 0 |
| DKA | 3 | 0 |