Intracranial Stenosis (WASID) — free guideline decision tool
Compute intracranial arterial stenosis from diameters using the WASID method (distinct from the extracranial NASCET method).
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does Intracranial Stenosis (WASID) do?
Quantify intracranial large-artery stenosis to guide intensive medical therapy decisions.
How is the result calculated?
WASID = (1 − Dstenosis/Dnormal)×100, using the proximal normal segment (or distal if proximally diseased). Mild < 50%, moderate 50–69%, severe 70–99%.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run Intracranial Stenosis (WASID) now
Compute intracranial arterial stenosis from diameters using the WASID method (distinct from the extracranial NASCET method).
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.