{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:7W7DC24LDR3SO4OIJELP3PKMKS","short_pith_number":"pith:7W7DC24L","canonical_record":{"source":{"id":"2011.11962","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-11-24T08:41:51Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"2ef0b100e4be21a1d1473df2732166f2a8541aa6784bbafc17787f586d56e410","abstract_canon_sha256":"f27a9cd452a03419c57abb7776728d2c7c4d5d6ce3894ce80e693702569c390b"},"schema_version":"1.0"},"canonical_sha256":"fdbe316b8b1c772771c84916fdbd4c54bc118a3e64c3317fdb47e53e38937fce","source":{"kind":"arxiv","id":"2011.11962","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.11962","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"arxiv_version","alias_value":"2011.11962v3","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.11962","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_12","alias_value":"7W7DC24LDR3S","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_16","alias_value":"7W7DC24LDR3SO4OI","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_8","alias_value":"7W7DC24L","created_at":"2026-07-05T03:09:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:7W7DC24LDR3SO4OIJELP3PKMKS","target":"record","payload":{"canonical_record":{"source":{"id":"2011.11962","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-11-24T08:41:51Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"2ef0b100e4be21a1d1473df2732166f2a8541aa6784bbafc17787f586d56e410","abstract_canon_sha256":"f27a9cd452a03419c57abb7776728d2c7c4d5d6ce3894ce80e693702569c390b"},"schema_version":"1.0"},"canonical_sha256":"fdbe316b8b1c772771c84916fdbd4c54bc118a3e64c3317fdb47e53e38937fce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:09:59.590879Z","signature_b64":"Wqp614D7vG4I5Flg/B6NXHT5bMuH+chKr5x7Efd7yGVc078kLAqgDXxcoOiOreczGV8OERFFVRbXBsXBRH3vAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fdbe316b8b1c772771c84916fdbd4c54bc118a3e64c3317fdb47e53e38937fce","last_reissued_at":"2026-07-05T03:09:59.590525Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:09:59.590525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.11962","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:09:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qg4JCxKa2GYQxSkKpM8n3qn9NSnNg/TSXPlrD7JUUqQ1NI/tbFJws4r5TV9EL5wrytsud4OXri3zlNEoS0QSCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T18:46:08.818741Z"},"content_sha256":"cfb51c22c181820b93cccbc4258c548b6df2dc0f2c7a00aea55a09bd3a8a82d9","schema_version":"1.0","event_id":"sha256:cfb51c22c181820b93cccbc4258c548b6df2dc0f2c7a00aea55a09bd3a8a82d9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:7W7DC24LDR3SO4OIJELP3PKMKS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Good and Bad Boundaries in Ultrasound Compounding: Preserving Anatomic Boundaries While Suppressing Artifacts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Alex Ling Yu Hung, John Galeotti","submitted_at":"2020-11-24T08:41:51Z","abstract_excerpt":"Ultrasound 3D compounding is important for volumetric reconstruction, but as of yet there is no consensus on best practices for compounding. Ultrasound images depend on probe direction and the path sound waves pass through, so when multiple intersecting B-scans of the same spot from different perspectives yield different pixel values, there is not a single, ideal representation for compounding (i.e. combining) the overlapping pixel values. Current popular methods inevitably suppress or altogether leave out bright or dark regions that are useful, and potentially introduce new artifacts. In this"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.11962","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.11962/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:09:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fkZXoulYZuWCzvudL2GJDAu0pJR6AFLsF0gSNe5rU6/4fFeYpzIDltOz00kZ3Dyn8rilmljeavAZbSdu6HoMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T18:46:08.819286Z"},"content_sha256":"ccacf22ab04c81f981671cd0652a0283f646de3143ae6f005544fa6fd77e1156","schema_version":"1.0","event_id":"sha256:ccacf22ab04c81f981671cd0652a0283f646de3143ae6f005544fa6fd77e1156"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7W7DC24LDR3SO4OIJELP3PKMKS/bundle.json","state_url":"https://pith.science/pith/7W7DC24LDR3SO4OIJELP3PKMKS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7W7DC24LDR3SO4OIJELP3PKMKS/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-15T18:46:08Z","links":{"resolver":"https://pith.science/pith/7W7DC24LDR3SO4OIJELP3PKMKS","bundle":"https://pith.science/pith/7W7DC24LDR3SO4OIJELP3PKMKS/bundle.json","state":"https://pith.science/pith/7W7DC24LDR3SO4OIJELP3PKMKS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7W7DC24LDR3SO4OIJELP3PKMKS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7W7DC24LDR3SO4OIJELP3PKMKS","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f27a9cd452a03419c57abb7776728d2c7c4d5d6ce3894ce80e693702569c390b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-11-24T08:41:51Z","title_canon_sha256":"2ef0b100e4be21a1d1473df2732166f2a8541aa6784bbafc17787f586d56e410"},"schema_version":"1.0","source":{"id":"2011.11962","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.11962","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"arxiv_version","alias_value":"2011.11962v3","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.11962","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_12","alias_value":"7W7DC24LDR3S","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_16","alias_value":"7W7DC24LDR3SO4OI","created_at":"2026-07-05T03:09:59Z"},{"alias_kind":"pith_short_8","alias_value":"7W7DC24L","created_at":"2026-07-05T03:09:59Z"}],"graph_snapshots":[{"event_id":"sha256:ccacf22ab04c81f981671cd0652a0283f646de3143ae6f005544fa6fd77e1156","target":"graph","created_at":"2026-07-05T03:09:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2011.11962/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultrasound 3D compounding is important for volumetric reconstruction, but as of yet there is no consensus on best practices for compounding. Ultrasound images depend on probe direction and the path sound waves pass through, so when multiple intersecting B-scans of the same spot from different perspectives yield different pixel values, there is not a single, ideal representation for compounding (i.e. combining) the overlapping pixel values. Current popular methods inevitably suppress or altogether leave out bright or dark regions that are useful, and potentially introduce new artifacts. In this","authors_text":"Alex Ling Yu Hung, John Galeotti","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-11-24T08:41:51Z","title":"Good and Bad Boundaries in Ultrasound Compounding: Preserving Anatomic Boundaries While Suppressing Artifacts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.11962","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:cfb51c22c181820b93cccbc4258c548b6df2dc0f2c7a00aea55a09bd3a8a82d9","target":"record","created_at":"2026-07-05T03:09:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f27a9cd452a03419c57abb7776728d2c7c4d5d6ce3894ce80e693702569c390b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-11-24T08:41:51Z","title_canon_sha256":"2ef0b100e4be21a1d1473df2732166f2a8541aa6784bbafc17787f586d56e410"},"schema_version":"1.0","source":{"id":"2011.11962","kind":"arxiv","version":3}},"canonical_sha256":"fdbe316b8b1c772771c84916fdbd4c54bc118a3e64c3317fdb47e53e38937fce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fdbe316b8b1c772771c84916fdbd4c54bc118a3e64c3317fdb47e53e38937fce","first_computed_at":"2026-07-05T03:09:59.590525Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:09:59.590525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wqp614D7vG4I5Flg/B6NXHT5bMuH+chKr5x7Efd7yGVc078kLAqgDXxcoOiOreczGV8OERFFVRbXBsXBRH3vAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:09:59.590879Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.11962","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfb51c22c181820b93cccbc4258c548b6df2dc0f2c7a00aea55a09bd3a8a82d9","sha256:ccacf22ab04c81f981671cd0652a0283f646de3143ae6f005544fa6fd77e1156"],"state_sha256":"925d6de5313756f8b51432cd4cdbe476bcdbb82ce809dc76c79eeed07ac9f045"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k3tm2cI2HMc4m7CLh47EMtW5A1C3ScnRo+051wjudFqy4l4VlfW48ma0Vzi/LUf91O+Z0FhK06eGomyo6L/6Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T18:46:08.823926Z","bundle_sha256":"70e60cae03880e1b7c06d55e92af11325753a5cdddf2c3667747f57ff371169e"}}