{"uid":"cap_0BthPPWP7ClKXGCrIr6MG","slug":"modified-fisher-ct-grade-lookup-frontera-2006-4838277a","name":"Modified Fisher CT Grade Lookup (Frontera 2006)","description":"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.","url":"https://api.magentlab.com/api/calc/modified_fisher","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["grade"],"properties":{"grade":{"type":"integer","description":"Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller from CT (0 no SAH or IVH; 1 focal or diffuse thin SAH, no IVH; 2 focal or diffuse thin SAH with IVH; 3 thick SAH, no IVH; 4 thick SAH with IVH). magent does not read the CT. Not Fisher 1980 original groups 1-4."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"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"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iVHrjAIZ44AJXdKqNsqdH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the published Frontera 2006 modified Fisher scale grade label and description for subarachnoid hemorrhage, given a caller-assigned CT grade of 0–4.","exampleAgentPrompt":"The CT scan has been read and the radiologist assigned a modified Fisher grade of 3 — can you look up what that grade means on the Frontera 2006 scale?","exampleUseCases":[{"title":"ED physician SAH grading reference","prompt":"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?"},{"title":"Clinical documentation review","prompt":"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."},{"title":"Neurology trainee education tool","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:20:16.026Z","isFirstParty":false}