{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6OJLQIRJC3UCZZMDNRIC4FST2Y","short_pith_number":"pith:6OJLQIRJ","canonical_record":{"source":{"id":"2605.26752","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2026-05-26T09:26:01Z","cross_cats_sorted":[],"title_canon_sha256":"7bf34554e824607750a69b43f51b42819ecfdfc714f5134849d5b9130ca02cf0","abstract_canon_sha256":"01b501201068ffe00ecddfcaf6158dc5a50d044a085884647f1904096b800f2b"},"schema_version":"1.0"},"canonical_sha256":"f392b8222916e82ce5836c502e1653d633eb74dac77c8417eb95dae6ef2b9baf","source":{"kind":"arxiv","id":"2605.26752","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.26752","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.26752v1","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.26752","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_12","alias_value":"6OJLQIRJC3UC","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_16","alias_value":"6OJLQIRJC3UCZZMD","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_8","alias_value":"6OJLQIRJ","created_at":"2026-05-27T01:06:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6OJLQIRJC3UCZZMDNRIC4FST2Y","target":"record","payload":{"canonical_record":{"source":{"id":"2605.26752","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2026-05-26T09:26:01Z","cross_cats_sorted":[],"title_canon_sha256":"7bf34554e824607750a69b43f51b42819ecfdfc714f5134849d5b9130ca02cf0","abstract_canon_sha256":"01b501201068ffe00ecddfcaf6158dc5a50d044a085884647f1904096b800f2b"},"schema_version":"1.0"},"canonical_sha256":"f392b8222916e82ce5836c502e1653d633eb74dac77c8417eb95dae6ef2b9baf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-27T01:06:10.808194Z","signature_b64":"PNZ9huTlwqHCDvK9hkVrgEC6iBOeY5kHpzAAamrGvjuBAGWqjA5yv3VGRMVLYdDz9HCOQrz9jVHWhJ0NLYCfCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f392b8222916e82ce5836c502e1653d633eb74dac77c8417eb95dae6ef2b9baf","last_reissued_at":"2026-05-27T01:06:10.807375Z","signature_status":"signed_v1","first_computed_at":"2026-05-27T01:06:10.807375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.26752","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-27T01:06:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VPxh4ChyNDVefjbEkEh63ZKUu1PhV6+TknUar2juAJmUNwlczwDUuLo+MAvkm4QG5mD18/Dd5rTUbMY/Q3eoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:45:27.838180Z"},"content_sha256":"92d40fed13337470eabb3f41d5bc2af7032213851c8df387faf7b4ffb37cd8b0","schema_version":"1.0","event_id":"sha256:92d40fed13337470eabb3f41d5bc2af7032213851c8df387faf7b4ffb37cd8b0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6OJLQIRJC3UCZZMDNRIC4FST2Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reconstructing 3D Neural Hemodynamics using Sparse Ultrasound Localization Microscopy Data","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Andriy S. Kozlov, Biao Huang, Chris Dunsby, Jingwen Zhu, Jipeng Yan, John Goodwin, Meng-Xing Tang, Oscar Bates, Qingyuan Tan","submitted_at":"2026-05-26T09:26:01Z","abstract_excerpt":"Ultrasound Localization Microscopy (ULM) has presented great potential in functional imaging, benefiting from its ability to reconstruct deep microvasculature. However, the hemodynamic reconstruction is compromised by sparsity in the ULM data, as a limited number of MB tracks cannot sample the complete speed profile in one vessel. Here, we propose to reconstruct hemodynamics using sparse ULM velocity maps by solving a laminar flow model through stochastic variational inference. In addition to vascular geometry and flow velocity maps, the proposed method generates two new ULM maps - a pressure "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.26752","kind":"arxiv","version":1},"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/2605.26752/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":"2026-05-27T01:06:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U6s0pVEJ5nRnjmXE9DtmVzWatofBjjsLFjepYa0xQ6sOPveS7uIqs8U27wdP205T5hA/0XKtmqosmfLMU4ltDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:45:27.838584Z"},"content_sha256":"f0988de29225113126b1a28069d1184e88cb8c6d87f9d27ce00806f3046ab558","schema_version":"1.0","event_id":"sha256:f0988de29225113126b1a28069d1184e88cb8c6d87f9d27ce00806f3046ab558"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/bundle.json","state_url":"https://pith.science/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/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":"2026-06-03T21:45:27Z","links":{"resolver":"https://pith.science/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y","bundle":"https://pith.science/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/bundle.json","state":"https://pith.science/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6OJLQIRJC3UCZZMDNRIC4FST2Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6OJLQIRJC3UCZZMDNRIC4FST2Y","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":"01b501201068ffe00ecddfcaf6158dc5a50d044a085884647f1904096b800f2b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2026-05-26T09:26:01Z","title_canon_sha256":"7bf34554e824607750a69b43f51b42819ecfdfc714f5134849d5b9130ca02cf0"},"schema_version":"1.0","source":{"id":"2605.26752","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.26752","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.26752v1","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.26752","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_12","alias_value":"6OJLQIRJC3UC","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_16","alias_value":"6OJLQIRJC3UCZZMD","created_at":"2026-05-27T01:06:10Z"},{"alias_kind":"pith_short_8","alias_value":"6OJLQIRJ","created_at":"2026-05-27T01:06:10Z"}],"graph_snapshots":[{"event_id":"sha256:f0988de29225113126b1a28069d1184e88cb8c6d87f9d27ce00806f3046ab558","target":"graph","created_at":"2026-05-27T01:06:10Z","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/2605.26752/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultrasound Localization Microscopy (ULM) has presented great potential in functional imaging, benefiting from its ability to reconstruct deep microvasculature. However, the hemodynamic reconstruction is compromised by sparsity in the ULM data, as a limited number of MB tracks cannot sample the complete speed profile in one vessel. Here, we propose to reconstruct hemodynamics using sparse ULM velocity maps by solving a laminar flow model through stochastic variational inference. In addition to vascular geometry and flow velocity maps, the proposed method generates two new ULM maps - a pressure ","authors_text":"Andriy S. Kozlov, Biao Huang, Chris Dunsby, Jingwen Zhu, Jipeng Yan, John Goodwin, Meng-Xing Tang, Oscar Bates, Qingyuan Tan","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2026-05-26T09:26:01Z","title":"Reconstructing 3D Neural Hemodynamics using Sparse Ultrasound Localization Microscopy Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.26752","kind":"arxiv","version":1},"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":"sha256:92d40fed13337470eabb3f41d5bc2af7032213851c8df387faf7b4ffb37cd8b0","target":"record","created_at":"2026-05-27T01:06:10Z","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":"01b501201068ffe00ecddfcaf6158dc5a50d044a085884647f1904096b800f2b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2026-05-26T09:26:01Z","title_canon_sha256":"7bf34554e824607750a69b43f51b42819ecfdfc714f5134849d5b9130ca02cf0"},"schema_version":"1.0","source":{"id":"2605.26752","kind":"arxiv","version":1}},"canonical_sha256":"f392b8222916e82ce5836c502e1653d633eb74dac77c8417eb95dae6ef2b9baf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f392b8222916e82ce5836c502e1653d633eb74dac77c8417eb95dae6ef2b9baf","first_computed_at":"2026-05-27T01:06:10.807375Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-27T01:06:10.807375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PNZ9huTlwqHCDvK9hkVrgEC6iBOeY5kHpzAAamrGvjuBAGWqjA5yv3VGRMVLYdDz9HCOQrz9jVHWhJ0NLYCfCw==","signature_status":"signed_v1","signed_at":"2026-05-27T01:06:10.808194Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.26752","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92d40fed13337470eabb3f41d5bc2af7032213851c8df387faf7b4ffb37cd8b0","sha256:f0988de29225113126b1a28069d1184e88cb8c6d87f9d27ce00806f3046ab558"],"state_sha256":"c1d15fc7852c39b7f4e02ab79c2778d0f304236694fe05a7ec35041fe89d5f3c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FOrAJv4OirCfYEzuCZyDQh20mOOG7vIFpaoS5Cr3iOsspVq1StkIiYjaAbCXLx1kUTw1aHAtkZm1kntZ6M3MDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T21:45:27.840629Z","bundle_sha256":"a1fa78209691de199caf74784884e46b520f2b8ca4eaf19fa1cfc18c08e217a2"}}