Pith Number

pith:IJ5HRYAO

pith:2026:IJ5HRYAOX6CL546W6YRTHSKMSP

not attested not anchored not stored refs pending

Few-Shot Left Atrial Wall Segmentation in 3D LGE MRI via Meta-Learning

Calum Redpath, David Birnie, Elena Pena, Pablo Nery, Rebecca Thornhill, Robert deKemp, Sreeraman Rajan, Yusri Al-Sanaani

Meta-learning with auxiliary cavity tasks improves few-shot accuracy for thin left atrial wall segmentation in 3D MRI.

arxiv:2603.24985 v3 · 2026-03-26 · cs.CV

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\usepackage{pith}
\pithnumber{IJ5HRYAOX6CL546W6YRTHSKMSP}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

MAML framework meta-trained on wall task together with auxiliary left and right atrial cavity tasks and boundary-aware composite loss improves segmentation over supervised fine-tuning, achieving DSC 0.64 vs 0.52 and HD95 5.70 vs 7.60 mm at 5-shot on hold-out test set.

C2weakest assumption

That the auxiliary cavity segmentation tasks share enough structure with the thin-wall task for effective meta-transfer, and that the chosen synthetic shift and local cohort adequately represent real clinical domain variations.

C3one line summary

MAML with auxiliary cavity tasks and boundary-aware loss achieves better few-shot 3D left atrial wall segmentation than standard fine-tuning, reaching DSC 0.64 at 5 shots versus 0.52.

Formal links

1 machine-checked theorem link

Receipt and verification

First computed	2026-05-25T02:01:18.244619Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

427a78e00ebf84bef3d6f62333c94c93cf3fe08815672091c932718a5ed794cf

Aliases

arxiv: 2603.24985 · arxiv_version: 2603.24985v3 · doi: 10.48550/arxiv.2603.24985 · pith_short_12: IJ5HRYAOX6CL · pith_short_16: IJ5HRYAOX6CL546W · pith_short_8: IJ5HRYAO

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IJ5HRYAOX6CL546W6YRTHSKMSP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 427a78e00ebf84bef3d6f62333c94c93cf3fe08815672091c932718a5ed794cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4c3d8a9b8bc8e87683d79765d34f3ee098a1e1945f0752f7a8f8b0d2faa19f8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-03-26T03:25:40Z",
    "title_canon_sha256": "49435d6dc63fcb6c6afb482db3c0d95dd258eae73267e8714aa08149c5aa5350"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.24985",
    "kind": "arxiv",
    "version": 3
  }
}