L2 📐 L2-523-001 ⊙ Testnet

Pneumothorax Detection from Chest X-ray (PWDR) — Spec Skeleton

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⬇ spec.md ⬇ spec.json

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⬇ L2-523-001.md ⬇ L2-523-001.json

Prompt — copy into your LLM

You are helping me submit a MODIFICATION of L2-523-001 (Pneumothorax Detection from Chest X-ray (PWDR) — Spec Skeleton) to the PWM Protocol — a Digital Twin (L2) artifact.

I will paste a Markdown template (or the current L2-523-001.md).
1. Rewrite the Markdown so the science is correct and clearly explained for my change.
2. Regenerate the sibling L2-523-001.json so EVERY field matches the Markdown.
3. Keep the schema in the "File Mapping" footer at the bottom of the MD.
4. Keep the parent reference unchanged unless I ask otherwise.
Rules: the Markdown is the source of truth; use SI units; do NOT invent benchmark scores.
Output each file in its own fenced code block tagged with the filename.

Here is my template:
[PASTE THE .md HERE]

⚙ Forward Model

derived from principle L1-523 
y = ∫_A dA `L.severity_threshold_classifier` `L.light_index_estimation` `L.pleural_line_detection` ∫µ dl I₀(E) x,    measurements ~ Poisson(αy)
world state x (1D pneumothorax severity)
→
X-ray source I₀(E)
→
Attenuation projection ∫µ dl
→
L · pleural line detection `L.pleural_line_detection`
→
L · light index estimation `L.light_index_estimation`
→
L · severity threshold classifier `L.severity_threshold_classifier`
→
Spatial integration ∫_A dA
→
observation y (x ray detector)

Noise: Poisson counting noise

Markdown — human-readable source of truth

⚙ auto-generated
⬇ L2-523-001.md