# 📐 L2 Spec — Planar X-ray Radiography Mismatch-Only Spec
**ID:** `L2-031-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-031`](/artifact/l1/L1-031)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553374
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 1024 – 4096 |
| W | px | 1024 – 4096 |
| Kvp | — | 30 – 150 |
| Mas | — | 0.1 – 200 |
| Scatter | — | 0.0 – 0.4 |
| Pixel um | µm | 50 – 500 |
| Tube drift | — | 0.0 – 0.1 |
| Patient motion | — | 0.0 – 0.3 |
| Anti scatter grid | — | 0.0 – 0.5 |
## 2. Tolerance (ε)
**Type:** `fn`
```
26.0 + 2.0 * log10(mAs / 0.1) - 8.0 * scatter - 5.0 * patient_motion
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`751265d0903c114b42cf1d4ed26b9f061bfcab617191d46865e5daa7eaaffe7e`
## 5. On-chain Registration
- **Chain hash:** `0x1d13c9aaadc8a71dae7129949e1217ca77671abd594f7c38dc7b4fca0a56eedf`
- **Chain tx hash:** `0x5f82e2010fe471128f200b8683be8b3234f1c6e62497eb184e742b9f84f9e3b5`
- **Chain block:** `41553374`
---
## File Mapping
This bundle consists of: `L2-031-001.md`, `L2-031-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-031-001.md` | Source of truth — edit this | Human or LLM |
| `L2-031-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-031-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._