{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:5TCHRZE5V2G2FBQYUJO662BZJP","short_pith_number":"pith:5TCHRZE5","canonical_record":{"source":{"id":"2201.04318","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2022-01-12T05:55:32Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"179e6bf5b6fc92f07ae431f28cc505102f00c4f6f5dae4f39a4f310a6cb0cd66","abstract_canon_sha256":"1bdadf02d14c4dc8a8ad1316b02bcbec3384fb1b179049e0a07d96577bf7fbf5"},"schema_version":"1.0"},"canonical_sha256":"ecc478e49dae8da28618a25def68394bdf855930d08e8236df4f8391ee052cde","source":{"kind":"arxiv","id":"2201.04318","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.04318","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"arxiv_version","alias_value":"2201.04318v1","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.04318","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_12","alias_value":"5TCHRZE5V2G2","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_16","alias_value":"5TCHRZE5V2G2FBQY","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_8","alias_value":"5TCHRZE5","created_at":"2026-07-05T03:47:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:5TCHRZE5V2G2FBQYUJO662BZJP","target":"record","payload":{"canonical_record":{"source":{"id":"2201.04318","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2022-01-12T05:55:32Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"179e6bf5b6fc92f07ae431f28cc505102f00c4f6f5dae4f39a4f310a6cb0cd66","abstract_canon_sha256":"1bdadf02d14c4dc8a8ad1316b02bcbec3384fb1b179049e0a07d96577bf7fbf5"},"schema_version":"1.0"},"canonical_sha256":"ecc478e49dae8da28618a25def68394bdf855930d08e8236df4f8391ee052cde","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:47:59.099689Z","signature_b64":"Q5Z39W0yYszp/q7qZdE0uHz1CAqecvonuDPD6/N2WGXOOQOfmxyoxlJ/X/H+z7/tW5Cf7QwIlagK+M14LlLvDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ecc478e49dae8da28618a25def68394bdf855930d08e8236df4f8391ee052cde","last_reissued_at":"2026-07-05T03:47:59.099277Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:47:59.099277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.04318","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":"2026-07-05T03:47:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TLlDrId/khIt6GFKu9n+yLIAKIgO1tpfurSAgty1fhAu58IPAdQ7ogsdq90N4leUCbv9U0ncVvjJzoOwD8SbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:48:14.133939Z"},"content_sha256":"a48aef85d960200d7fd8edac749595d5d2b5d1e691900b922d63d4038f5394a6","schema_version":"1.0","event_id":"sha256:a48aef85d960200d7fd8edac749595d5d2b5d1e691900b922d63d4038f5394a6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:5TCHRZE5V2G2FBQYUJO662BZJP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Knee Cartilage Defect Assessment by Graph Representation and Surface Convolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Dinggang Shen, Kai Xuan, Lichi Zhang, Liping Si, Qian Wang, Sheng Wang, Weiwu Yao, Xi Ouyang, Yiqiang Zhan, Zhong Xue, Zixu Zhuang","submitted_at":"2022-01-12T05:55:32Z","abstract_excerpt":"Knee osteoarthritis (OA) is the most common osteoarthritis and a leading cause of disability. Cartilage defects are regarded as major manifestations of knee OA, which are visible by magnetic resonance imaging (MRI). Thus early detection and assessment for knee cartilage defects are important for protecting patients from knee OA. In this way, many attempts have been made on knee cartilage defect assessment by applying convolutional neural networks (CNNs) to knee MRI. However, the physiologic characteristics of the cartilage may hinder such efforts: the cartilage is a thin curved layer, implying"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.04318","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/2201.04318/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":"2026-07-05T03:47:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"olm2DylTAM49CYF5UhRvYB1dmxe2V/b+0KnGETvPq92Ad7wTxk/ucwPreIVNs5cvgkzH7OnCMo/aVd05sf1eAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:48:14.134308Z"},"content_sha256":"320768de4fc1a28e4729077daeb31a78ac54efe220baf2e894c8afe1e8031a62","schema_version":"1.0","event_id":"sha256:320768de4fc1a28e4729077daeb31a78ac54efe220baf2e894c8afe1e8031a62"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5TCHRZE5V2G2FBQYUJO662BZJP/bundle.json","state_url":"https://pith.science/pith/5TCHRZE5V2G2FBQYUJO662BZJP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5TCHRZE5V2G2FBQYUJO662BZJP/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":"2026-07-07T13:48:14Z","links":{"resolver":"https://pith.science/pith/5TCHRZE5V2G2FBQYUJO662BZJP","bundle":"https://pith.science/pith/5TCHRZE5V2G2FBQYUJO662BZJP/bundle.json","state":"https://pith.science/pith/5TCHRZE5V2G2FBQYUJO662BZJP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5TCHRZE5V2G2FBQYUJO662BZJP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:5TCHRZE5V2G2FBQYUJO662BZJP","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":"1bdadf02d14c4dc8a8ad1316b02bcbec3384fb1b179049e0a07d96577bf7fbf5","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2022-01-12T05:55:32Z","title_canon_sha256":"179e6bf5b6fc92f07ae431f28cc505102f00c4f6f5dae4f39a4f310a6cb0cd66"},"schema_version":"1.0","source":{"id":"2201.04318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.04318","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"arxiv_version","alias_value":"2201.04318v1","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.04318","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_12","alias_value":"5TCHRZE5V2G2","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_16","alias_value":"5TCHRZE5V2G2FBQY","created_at":"2026-07-05T03:47:59Z"},{"alias_kind":"pith_short_8","alias_value":"5TCHRZE5","created_at":"2026-07-05T03:47:59Z"}],"graph_snapshots":[{"event_id":"sha256:320768de4fc1a28e4729077daeb31a78ac54efe220baf2e894c8afe1e8031a62","target":"graph","created_at":"2026-07-05T03:47:59Z","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/2201.04318/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Knee osteoarthritis (OA) is the most common osteoarthritis and a leading cause of disability. Cartilage defects are regarded as major manifestations of knee OA, which are visible by magnetic resonance imaging (MRI). Thus early detection and assessment for knee cartilage defects are important for protecting patients from knee OA. In this way, many attempts have been made on knee cartilage defect assessment by applying convolutional neural networks (CNNs) to knee MRI. However, the physiologic characteristics of the cartilage may hinder such efforts: the cartilage is a thin curved layer, implying","authors_text":"Dinggang Shen, Kai Xuan, Lichi Zhang, Liping Si, Qian Wang, Sheng Wang, Weiwu Yao, Xi Ouyang, Yiqiang Zhan, Zhong Xue, Zixu Zhuang","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2022-01-12T05:55:32Z","title":"Knee Cartilage Defect Assessment by Graph Representation and Surface Convolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.04318","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:a48aef85d960200d7fd8edac749595d5d2b5d1e691900b922d63d4038f5394a6","target":"record","created_at":"2026-07-05T03:47:59Z","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":"1bdadf02d14c4dc8a8ad1316b02bcbec3384fb1b179049e0a07d96577bf7fbf5","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2022-01-12T05:55:32Z","title_canon_sha256":"179e6bf5b6fc92f07ae431f28cc505102f00c4f6f5dae4f39a4f310a6cb0cd66"},"schema_version":"1.0","source":{"id":"2201.04318","kind":"arxiv","version":1}},"canonical_sha256":"ecc478e49dae8da28618a25def68394bdf855930d08e8236df4f8391ee052cde","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ecc478e49dae8da28618a25def68394bdf855930d08e8236df4f8391ee052cde","first_computed_at":"2026-07-05T03:47:59.099277Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:47:59.099277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q5Z39W0yYszp/q7qZdE0uHz1CAqecvonuDPD6/N2WGXOOQOfmxyoxlJ/X/H+z7/tW5Cf7QwIlagK+M14LlLvDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:47:59.099689Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.04318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a48aef85d960200d7fd8edac749595d5d2b5d1e691900b922d63d4038f5394a6","sha256:320768de4fc1a28e4729077daeb31a78ac54efe220baf2e894c8afe1e8031a62"],"state_sha256":"2eb4a44ef699dc0fa6a5e76189acec264550f7e06d8ed6fcea45aae64fb7ac9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v+l/csyuinh1XItdB8FYcS+Zkdu8rPlF2g0Uku0sJArYockhB6FfG2ZitcNQSLgyLIdXBYWCN5q/M3cXoq/KAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:48:14.136300Z","bundle_sha256":"44dfcbbb829744ab1062f780067213cb515c314f6f262e56def35386a75e08e2"}}