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ctp-skill SKILL.md skillA

ctp-skill from cuhk-aim-group/neurodiscovery is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add cuhk-aim-group/neurodiscovery/ctp-skill@git:20260914.cfc1dd5

Pins git:20260914.cfc1dd5 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: cuhk-aim-group/neurodiscovery
Path: skills/ctp-skill/SKILL.md
Versions recorded: 1
Latest version: git:20260914.cfc1dd5, committed Sep 14, 2026
Size: 3,700 bytes
Repository stars: 93
License: MIT

Process 4D CT perfusion (CTP) time series and supplied Tmax, CBF, CBV and MTT maps, including rigid motion correction, AIF/VOF-based deconvolution, spatial/unit validation and ROI/QC outputs. Use for CT perfusion, not ASL or DSC perfusion MRI.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# CT Perfusion Skill

Research workflows for NeuroDiscovery. Read [the input and method contract](references/input-contract.md) before processing data. These reference implementations are not clinically validated diagnostic software; do not label an ischemic core, penumbra, treatment eligibility or patient outcome from their maps.

## Choose the input route

- **4D CT:** accept a NIfTI HU series and acquisition timing, reviewed precontrast frames, brain mask and arterial input function (AIF) mask. For DICOM, first use a validated converter with rescale slope/intercept and per-frame acquisition timing preserved; never guess slice ordering or time units. Shuttle/per-slice asynchronous data need explicit upstream temporal reconstruction.
- **Unaligned frames:** use `scripts/motion_correct.py`, inspect motion and all-frame coverage, then save a reviewed metadata file. Do not declare registration good just because the optimizer stopped. Register/select all masks in the fixed frame.
- **Already derived maps:** use `scripts/ctp.py summarize`. Require units and a common affine/grid; never infer vendor scaling or replace missing-value codes with meaningful zero perfusion.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add cuhk-aim-group/neurodiscovery/ctp-skill@sha256:467773abd4331798

The line at the top of this page pins the label git:20260914.cfc1dd5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_qbgz5353w2j47cwt.svg)](https://markdownregistry.com/a/art_qbgz5353w2j47cwt)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Sep 14, 2026.

version	committed	commit	size	audit
git:20260914.cfc1dd5 latest	2026-09-14	cfc1dd5	3,700 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3700 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

cuhk-aim-group/neurodiscovery · 93 stars · license MIT · pushed 2026-10-23 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qbgz5353w2j47cwt
GET https://markdownregistry.com/api/v1/resolve?ref=cuhk-aim-group/neurodiscovery/ctp-skill
GET https://markdownregistry.com/api/v1/blob/467773abd4331798f7004202a9c48e8745b94b134c3dc75a0ca19e042479382a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.