{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RVNI637XIBELN7LVDU57KXAGHK","short_pith_number":"pith:RVNI637X","canonical_record":{"source":{"id":"1909.02087","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-09-04T20:20:22Z","cross_cats_sorted":[],"title_canon_sha256":"e4a0dfd7283c8174057a43e3ff58df47adaa7b8f8c9235a28f5885834a8dd834","abstract_canon_sha256":"25a7218baa21375e8e0c41a090a02277e3e488a6f7a03f219941b04838ed5b73"},"schema_version":"1.0"},"canonical_sha256":"8d5a8f6ff74048b6fd751d3bf55c063a883806989b5bb8b354252f9fc67affef","source":{"kind":"arxiv","id":"1909.02087","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.02087","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"arxiv_version","alias_value":"1909.02087v1","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.02087","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_12","alias_value":"RVNI637XIBEL","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_16","alias_value":"RVNI637XIBELN7LV","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_8","alias_value":"RVNI637X","created_at":"2026-07-05T00:02:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RVNI637XIBELN7LVDU57KXAGHK","target":"record","payload":{"canonical_record":{"source":{"id":"1909.02087","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-09-04T20:20:22Z","cross_cats_sorted":[],"title_canon_sha256":"e4a0dfd7283c8174057a43e3ff58df47adaa7b8f8c9235a28f5885834a8dd834","abstract_canon_sha256":"25a7218baa21375e8e0c41a090a02277e3e488a6f7a03f219941b04838ed5b73"},"schema_version":"1.0"},"canonical_sha256":"8d5a8f6ff74048b6fd751d3bf55c063a883806989b5bb8b354252f9fc67affef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:02:30.204426Z","signature_b64":"0gWBpFUvcN+zODeHvM45voaK3etNvGkDzopu+MynKHsMtEBKvJRA8Qt21NNikqcXr+m1H773GeR33hsPo9o5DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d5a8f6ff74048b6fd751d3bf55c063a883806989b5bb8b354252f9fc67affef","last_reissued_at":"2026-07-05T00:02:30.203910Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:02:30.203910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.02087","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":"2026-07-05T00:02:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ukvYpMTvx0gM/5WXGo/4EpRoxNoqBW7qwr21s7jlusxFA8p6J8mJmYlTW4jOBEk06E7bF7AVp59D9QqQhbIDBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:30:41.536603Z"},"content_sha256":"9c900f9a7a0bc5cb4f20faa15a17fe0ffcd9e42ca105599cd40ec6c6b6417892","schema_version":"1.0","event_id":"sha256:9c900f9a7a0bc5cb4f20faa15a17fe0ffcd9e42ca105599cd40ec6c6b6417892"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RVNI637XIBELN7LVDU57KXAGHK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Automated Artery Localization and Vessel Wall Segmentation of Magnetic Resonance Vessel Wall Images using Tracklet Refinement and Polar Conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Chun Yuan, Gador Canton, Jenq-Neng Hwang, Jie Sun, Li Chen, Niranjan Balu, Rui Li, Thomas S. Hatsukami, Xihai Zhao","submitted_at":"2019-09-04T20:20:22Z","abstract_excerpt":"Quantitative analysis of vessel wall structures by automated vessel wall segmentation provides useful imaging biomarkers in evaluating atherosclerotic lesions and plaque progression time-efficiently. To quantify vessel wall features, drawing lumen and outer wall contours of the artery of interest is required. To alleviate manual labor in contour drawing, some computer-assisted tools exist, but manual preprocessing steps, such as region of interest identification and boundary initialization are needed. In addition, the prior knowledge of the ring shape of vessel wall is not taken into considera"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.02087","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/1909.02087/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":"2026-07-05T00:02:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hwN7AnlukoRCwFZGHR4t7HVeO0PusoFvMqpkcn3ltXcZpEM6j05Av9AQY3xHEYs0A94Hc7u7TM6nWYY7XyhkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:30:41.538018Z"},"content_sha256":"c01274e215afaca5a5ca4b40225ca2267907b117223e9c7242b6a6d4208150cc","schema_version":"1.0","event_id":"sha256:c01274e215afaca5a5ca4b40225ca2267907b117223e9c7242b6a6d4208150cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RVNI637XIBELN7LVDU57KXAGHK/bundle.json","state_url":"https://pith.science/pith/RVNI637XIBELN7LVDU57KXAGHK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RVNI637XIBELN7LVDU57KXAGHK/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":"2026-08-17T22:30:41Z","links":{"resolver":"https://pith.science/pith/RVNI637XIBELN7LVDU57KXAGHK","bundle":"https://pith.science/pith/RVNI637XIBELN7LVDU57KXAGHK/bundle.json","state":"https://pith.science/pith/RVNI637XIBELN7LVDU57KXAGHK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RVNI637XIBELN7LVDU57KXAGHK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RVNI637XIBELN7LVDU57KXAGHK","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":"25a7218baa21375e8e0c41a090a02277e3e488a6f7a03f219941b04838ed5b73","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-09-04T20:20:22Z","title_canon_sha256":"e4a0dfd7283c8174057a43e3ff58df47adaa7b8f8c9235a28f5885834a8dd834"},"schema_version":"1.0","source":{"id":"1909.02087","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.02087","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"arxiv_version","alias_value":"1909.02087v1","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.02087","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_12","alias_value":"RVNI637XIBEL","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_16","alias_value":"RVNI637XIBELN7LV","created_at":"2026-07-05T00:02:30Z"},{"alias_kind":"pith_short_8","alias_value":"RVNI637X","created_at":"2026-07-05T00:02:30Z"}],"graph_snapshots":[{"event_id":"sha256:c01274e215afaca5a5ca4b40225ca2267907b117223e9c7242b6a6d4208150cc","target":"graph","created_at":"2026-07-05T00:02:30Z","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/1909.02087/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantitative analysis of vessel wall structures by automated vessel wall segmentation provides useful imaging biomarkers in evaluating atherosclerotic lesions and plaque progression time-efficiently. To quantify vessel wall features, drawing lumen and outer wall contours of the artery of interest is required. To alleviate manual labor in contour drawing, some computer-assisted tools exist, but manual preprocessing steps, such as region of interest identification and boundary initialization are needed. In addition, the prior knowledge of the ring shape of vessel wall is not taken into considera","authors_text":"Chun Yuan, Gador Canton, Jenq-Neng Hwang, Jie Sun, Li Chen, Niranjan Balu, Rui Li, Thomas S. Hatsukami, Xihai Zhao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-09-04T20:20:22Z","title":"Automated Artery Localization and Vessel Wall Segmentation of Magnetic Resonance Vessel Wall Images using Tracklet Refinement and Polar Conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.02087","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":"sha256:9c900f9a7a0bc5cb4f20faa15a17fe0ffcd9e42ca105599cd40ec6c6b6417892","target":"record","created_at":"2026-07-05T00:02:30Z","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":"25a7218baa21375e8e0c41a090a02277e3e488a6f7a03f219941b04838ed5b73","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-09-04T20:20:22Z","title_canon_sha256":"e4a0dfd7283c8174057a43e3ff58df47adaa7b8f8c9235a28f5885834a8dd834"},"schema_version":"1.0","source":{"id":"1909.02087","kind":"arxiv","version":1}},"canonical_sha256":"8d5a8f6ff74048b6fd751d3bf55c063a883806989b5bb8b354252f9fc67affef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d5a8f6ff74048b6fd751d3bf55c063a883806989b5bb8b354252f9fc67affef","first_computed_at":"2026-07-05T00:02:30.203910Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:02:30.203910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0gWBpFUvcN+zODeHvM45voaK3etNvGkDzopu+MynKHsMtEBKvJRA8Qt21NNikqcXr+m1H773GeR33hsPo9o5DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:02:30.204426Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.02087","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c900f9a7a0bc5cb4f20faa15a17fe0ffcd9e42ca105599cd40ec6c6b6417892","sha256:c01274e215afaca5a5ca4b40225ca2267907b117223e9c7242b6a6d4208150cc"],"state_sha256":"c34d954b226f1d092f3749af7ea9e982af95326a6ce62f941877aeaa67296a6b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N7qD+EzLCjfjy9mMykGz7RK/Io7JMR8p36EIyOTWSKmMuim0Xn9Dvh1bHsZ3HHRLNOyLmmOQ9rlTyEmyupP0Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T22:30:41.610181Z","bundle_sha256":"79093d77c218066778ae8955a6ab84d1068d14175a8bb2e2905ff47a3f4c982d"}}