{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:PAX2FNLX4W7VHK32EONT6LLCE4","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":"8f3cd329fd6a362e3cd54bb9e8d5056c2b3d9fecbdb01a8f1bf8f8b0bb77955d","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2026-05-24T15:36:53Z","title_canon_sha256":"e914c468b1074f2ab8bbafe8fa7a9f4229c477ac67f4395173c761d48bce36d4"},"schema_version":"1.0","source":{"id":"2605.25139","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.25139","created_at":"2026-05-26T02:04:19Z"},{"alias_kind":"arxiv_version","alias_value":"2605.25139v1","created_at":"2026-05-26T02:04:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.25139","created_at":"2026-05-26T02:04:19Z"},{"alias_kind":"pith_short_12","alias_value":"PAX2FNLX4W7V","created_at":"2026-05-26T02:04:19Z"},{"alias_kind":"pith_short_16","alias_value":"PAX2FNLX4W7VHK32","created_at":"2026-05-26T02:04:19Z"},{"alias_kind":"pith_short_8","alias_value":"PAX2FNLX","created_at":"2026-05-26T02:04:19Z"}],"graph_snapshots":[{"event_id":"sha256:503512e088f0c769f1bd636c92aa53bb46b5db6549011e5dacb4bd531263bb00","target":"graph","created_at":"2026-05-26T02:04:19Z","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/2605.25139/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultrasound computed tomography is emerging as a promising safe and accessible modality for soft-tissue medical imaging, with full waveform inversion playing a key role in unlocking its full potential for high-resolution, quantitative reconstructions. Frequency domain full waveform inversion (FDFWI) for reconstructing spatial maps of acoustic properties in the musculoskeletal system is highly sensitive to the quality of low-frequency signals, making the final imaging outcome vulnerable to issues such as inappropriate initial models and strong scatterings related to bones. To address these chall","authors_text":"Chang Su, He Sun, Lekang Jiang, Ligang Cui, Weijun Lin, Xiangwei Lu, Yifei Sun, Yubing Li","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2026-05-24T15:36:53Z","title":"Hybrid Full Waveform Inversion Assisted by Rytov Approximation for Musculoskeletal Ultrasound Computed Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.25139","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":"sha256:840f892a219e4440068cf813d9ec09aa1ae4d5757540df17fccb4766e8271506","target":"record","created_at":"2026-05-26T02:04:19Z","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":"8f3cd329fd6a362e3cd54bb9e8d5056c2b3d9fecbdb01a8f1bf8f8b0bb77955d","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2026-05-24T15:36:53Z","title_canon_sha256":"e914c468b1074f2ab8bbafe8fa7a9f4229c477ac67f4395173c761d48bce36d4"},"schema_version":"1.0","source":{"id":"2605.25139","kind":"arxiv","version":1}},"canonical_sha256":"782fa2b577e5bf53ab7a239b3f2d62271b67b2c94b7be2ffe630b5469e7c891d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"782fa2b577e5bf53ab7a239b3f2d62271b67b2c94b7be2ffe630b5469e7c891d","first_computed_at":"2026-05-26T02:04:19.926083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T02:04:19.926083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dFFIiL22aApWObPbvCwuocZqVHGY9OQaJsGyb8vKrUwA13iMoHx0RpC8092b0bDMV7AB3vGbgeR2SHOkT19zDw==","signature_status":"signed_v1","signed_at":"2026-05-26T02:04:19.926752Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.25139","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:840f892a219e4440068cf813d9ec09aa1ae4d5757540df17fccb4766e8271506","sha256:503512e088f0c769f1bd636c92aa53bb46b5db6549011e5dacb4bd531263bb00"],"state_sha256":"7b0f7e718172e2c0c1e121835d48c2eda87b96374691236e1e912cd89418df02"}