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Modified Fisher CT Grade Lookup (Frontera 2006)
x402
Modified Fisher CT Grade Lookup (Frontera 2006) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns the published Frontera 2006 modified Fisher scale grade label and description for subarachnoid hemorrhage, given a caller-assigned CT grade of 0–4.
Price / call$0.005
Success—
StatusUnknown
How this service works
Frontera 2006 modified Fisher CT grades 0-4 for subarachnoid hemorrhage as assigned from CT by the caller. Returns the published grade and description (0 no SAH or IVH; 1 focal or diffuse thin SAH, no IVH; 2 thin SAH with IVH; 3 thick SAH, no IVH; 4 thick SAH with IVH). Not Fisher 1980 original groups 1-4. Not a diagnosis; magent does not read the CT or invent a millimetre cutoff or vasospasm percentage.
Output
Returns the Frontera 2006 modified Fisher grade number and its published description: grade 0 (no SAH or IVH), grade 1 (focal or diffuse thin SAH, no IVH), grade 2 (thin SAH with IVH), grade 3 (thick SAH, no IVH), or grade 4 (thick SAH with IVH). The endpoint does not read CT images or make clinical diagnoses.
Example use cases
ED physician SAH grading reference
“A patient came in with a subarachnoid hemorrhage and the CT was read as modified Fisher grade 2. What does that grade mean according to the Frontera 2006 modified Fisher scale?”
Clinical documentation review
“I'm documenting a SAH case and the CT grade was assigned as modified Fisher 4. Pull the official grade label and description from the Frontera 2006 scale so I can include it in the note.”
Neurology trainee education tool
“Can you explain what modified Fisher grade 1 means on the Frontera 2006 subarachnoid hemorrhage CT scale — specifically whether it involves thin or thick SAH and whether IVH is present?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/modified_fisherWhen to prefer
Use this endpoint when an agent needs to retrieve the canonical published text of a Frontera 2006 modified Fisher CT grade for subarachnoid hemorrhage that has already been assigned by a clinician or radiologist. Prefer this over manual lookup tables when automating clinical documentation, EHR population, or educational tools. Do not use this to grade a CT scan from raw imaging — the grade must be externally assigned first.
Side effects
- Grade value outside 0–4 integer range returns an error or empty result
- Non-integer grade values (e.g. 1.5) are rejected
- Missing required 'grade' query parameter returns a 400 error
- Confusion with original Fisher 1980 scale (groups 1–4) may lead to wrong grade being submitted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/modified_fisher",
"count": 2,
"items": [
{
"grade": 1,
"score": 1,
"formula": "modified_fisher",
"citation": {
"id": "frontera-2006",
"doi": "10.1227/01.NEU.0000218821.34014.1B",
"pmid": "16823296",
"title": "Prediction of symptomatic vasospasm after subarachnoid hemorrhage: the modified fisher scale",
"source": "Neurosurgery. 2006;59(1):21-27",
"authors": "Frontera JA, Claassen J, Schmidt JM, et al."
},
"max_score": 4,
"components": [
{
"factor": "grade",
"points": 1,
"present": true
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"description": "Focal or diffuse, thin SAH, no IVH",
"formula_expression": "Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller"
},
{
"grade": 1,
"score": 1,
"formula": "modified_fisher",
"citation": {
"id": "frontera-2006",
"doi": "10.1227/01.NEU.0000218821.34014.1B",
"pmid": "16823296",
"title": "Prediction of symptomatic vasospasm after subarachnoid hemorrhage: the modified fisher scale",
"source": "Neurosurgery. 2006;59(1):21-27",
"authors": "Frontera JA, Claassen J, Schmidt JM, et al."
},
"max_score": 4,
"components": [
{
"factor": "grade",
"points": 1,
"present": true
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"description": "Focal or diffuse, thin SAH, no IVH",
"formula_expression": "Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller"
}
]
}
}Tags
x402
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