Pith Number

pith:OT2JEQT2

pith:2026:OT2JEQT24OTULFMJEJRQ2CIAV2

not attested not anchored not stored refs pending

ffdas: Volumetric ultrasound reconstruction at warp speed

Luuk Verhoef, Pieter Kruizinga

arxiv:2606.13259 v1 · 2026-06-11 · physics.med-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OT2JEQT24OTULFMJEJRQ2CIAV2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-06-12T01:09:49.287600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74f492427ae3a745958922630d0900aeaaae5e3b3af7f0e2198f46512c3df95c

Aliases

arxiv: 2606.13259 · arxiv_version: 2606.13259v1 · doi: 10.48550/arxiv.2606.13259 · pith_short_12: OT2JEQT24OTU · pith_short_16: OT2JEQT24OTULFMJ · pith_short_8: OT2JEQT2

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/OT2JEQT24OTULFMJEJRQ2CIAV2 \
  | 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: 74f492427ae3a745958922630d0900aeaaae5e3b3af7f0e2198f46512c3df95c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0523a5cee5ee569c251de64b8f36111e36045edf144b8090bc2fe78678f25153",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2026-06-11T12:16:28Z",
    "title_canon_sha256": "2d1d5ee92548a6c88aaa2d8f5a548dfb805ffc81e6f094aeb85446d76cfbbcb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.13259",
    "kind": "arxiv",
    "version": 1
  }
}