/dicom-series-preflight

name: dicom-series-preflight
description: Used for header-only preflight of one DICOM series folder before conversion or inference. Not for de-identification or clinical clearance.
license: Apache-2.0
allowed-tools: Bash
metadata:
  author: 'NVIDIA MedTech Team'
  tags:
    - MedTech
    - DICOM
    - preflight

DICOM Series Preflight

Purpose

• Used for header-only preflight of one DICOM series folder before conversion or inference. Not for de-identification or clinical clearance.
• Use the wrapper exactly as documented; do not replace the upstream entrypoint with a handwritten implementation.
• Manifest I/O: inputs are `dicom_dir`; outputs are `preflight_json`.

Instructions

• Read `skill_manifest.yaml` before changing arguments, side effects, or validation gates.
• Run `scripts/preflight_series.py` through the documented command below; keep outputs under a caller-provided run directory.
• If a host agent exposes `run_script`, use `run_script("scripts/preflight_series.py", args=[...])`; otherwise run the Bash/Python command shown below.
• Check the emitted JSON and paired verifier guidance before treating the run as evidence.

Available Scripts

| Script | Purpose | Arguments | |---|---|---| | `scripts/preflight_series.py` | Primary entrypoint declared by skill_manifest.yaml. | `PATH_TO_DICOM_DIR` |

Prerequisites

• Runtime requirements: Python packages listed in `runtime.side_effects.pip_packages`.
• NiBabel 5.4 or newer is required so extreme-oblique axes remain labeled consistently across reorientation.
• Run commands from the repository root unless an existing section below says otherwise.

Limitations

• Header-only; does not decode pixel data or detect burnt-in PHI.
• Canonical orientation gate assumes LPS-derived CT axcodes L,P,S.
• Compressed transfer syntax and multi-frame instances are warned, not decoded.
• Single-directory scan; does not reconcile multiple studies in one tree.
• Not for clinical deployment, regulatory de-identification, autonomous diagnosis, production ingestion without a vetted converter.

Troubleshooting

| Error | Cause | Fix | |---|---|---| | Missing dependency or import error | Runtime package drift from `skill_manifest.yaml`. | Install the packages declared in the manifest or use the documented setup command. | | Empty or schema-invalid output | Wrong input path, unsupported modality, or upstream failure. | Re-run with a known fixture and inspect the wrapper JSON plus stderr. | | Validation gate failure | Output violated a declared engineering invariant. | Keep the failed evidence pack and use the gate message to repair inputs or wrapper code. |

Scans a DICOM **directory** (one series per folder) without decoding pixels. Emits JSON with inventory, orientation axcodes, PHI flags, findings, and a `preflight.verdict` of `pass`, `warn`, or `fail`.

python scripts/preflight_series.py PATH_TO_DICOM_DIR

Pair with `verifiers/dicom_preflight_quality_v1` for a trusted preflight pack:

make run-trusted SKILL=dicom_series_preflight \
  FIXTURE=skills/dicom-series-preflight/fixtures/clean_no_phi \
  OUT=runs/dicom_preflight_demo

Flagship workflow:

make run-workflow \
  WORKFLOW=examples/workflows/dicom_preflight_gate.yaml \
  WORKFLOW_INPUT=skills/dicom-series-preflight/fixtures/clean_no_phi \
  WORKFLOW_OUT=runs/dicom_preflight_gate

Not for de-identification, private-tag review, or clinical clearance.