Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →nvidia/i4h-catheter-navigation-digital-twin
Build a patient vasculature digital twin from CT (preprocess + segment).
Passed 14 of 18 test cases with the skill, and 3 of 18 without it.
and 15 more in the full report
13 fixed4 passed either way5 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
After finishing CT preprocessing, I need to segment the arterial vessel tree using ground truth segmentation files stored in `/data/ct_01/segmentations`. What command flag specifies the ground truth segmentation directory?
| Checked | Without skill | With skill |
|---|---|---|
| Passes --ts-gt-dir argument to segment_vessels command. | Missed | Passed |
The instructions your model reads when the skill loads.
Download or locate a CT volume, preprocess it to an attenuation cache, and segment the arterial tree into vessel mask + centerline - the vasculature digital twin required for patient-specific viewport and DRR runs.
ROOT="${I4H_WORKFLOWS:-$(git rev-parse --show-toplevel 2>/dev/null)}"
if [ ! -d "$ROOT/workflows/catheter_navigation" ]; then
ROOT="${I4H_WORKFLOWS:-$HOME/i4h-workflows}"
[ -d "$ROOT/workflows/catheter_navigation" ] || git clone https://github.com/isaac-for-healthcare/i4h-workflows "$ROOT"
fi
export I4H_WORKFLOWS="$ROOT"; cd "$ROOT"
--output-dir / --ct-dir (e.g. /tmp/ct_cache) holds mu_volume.npy, metadata.json, and after segmentation vessel mask + centerline artifacts.Run the steps below in order. Each step is a separate bash call; variables persist in the local agent's tmux session.
REPO_ROOT="${I4H_WORKFLOWS:-$(git rev-parse --show-toplevel 2>/dev/null)}"; [ -d "$REPO_ROOT/workflows/catheter_navigation" ] || REPO_ROOT="$HOME/i4h-workflows"
WF_ROOT="${REPO_ROOT}/workflows/catheter_navigation"
RUN_DIR="${WF_ROOT}/runs/digital_twin_$(date +%Y%m%d_%H%M%S)"
mkdir -p "${RUN_DIR}/logs"
ln -sfn "${RUN_DIR}" "${WF_ROOT}/runs/.latest"
# User-supplied or downloaded subject directory (must contain ct.nii.gz + segmentations/)
SUBJ="${SUBJ:-}"
CACHE="${CACHE:-/tmp/ct_cache}"
test cases passed, vs 3 / 18 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.