{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:ZCBMC3SGJ62R7WFR3V5LII53WJ","short_pith_number":"pith:ZCBMC3SG","canonical_record":{"source":{"id":"2211.11553","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-11-21T15:20:18Z","cross_cats_sorted":["eess.IV","eess.SP"],"title_canon_sha256":"a6c8c4ece4ee9e84b5abf2b2aa1d02b029bef0511e9b33bf4ed459160d51bbe3","abstract_canon_sha256":"375f1b24c37a8869ec000c1a4912598d35a81d276a978f9908bfed50d2621081"},"schema_version":"1.0"},"canonical_sha256":"c882c16e464fb51fd8b1dd7ab423bbb26efc183b2c411b53154aecb4fbdaf335","source":{"kind":"arxiv","id":"2211.11553","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.11553","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"2211.11553v1","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.11553","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZCBMC3SGJ62R","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_16","alias_value":"ZCBMC3SGJ62R7WFR","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_8","alias_value":"ZCBMC3SG","created_at":"2026-07-05T05:17:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:ZCBMC3SGJ62R7WFR3V5LII53WJ","target":"record","payload":{"canonical_record":{"source":{"id":"2211.11553","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-11-21T15:20:18Z","cross_cats_sorted":["eess.IV","eess.SP"],"title_canon_sha256":"a6c8c4ece4ee9e84b5abf2b2aa1d02b029bef0511e9b33bf4ed459160d51bbe3","abstract_canon_sha256":"375f1b24c37a8869ec000c1a4912598d35a81d276a978f9908bfed50d2621081"},"schema_version":"1.0"},"canonical_sha256":"c882c16e464fb51fd8b1dd7ab423bbb26efc183b2c411b53154aecb4fbdaf335","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:17:54.980522Z","signature_b64":"+D+uqoqH9lUQui9BtLBM3W0TFy6LlLgcAFIHkN3W1zFoT6O6JJCi1r7b9a8pH8kyGuJ1Qq5qUBQ7qe/acsCwDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c882c16e464fb51fd8b1dd7ab423bbb26efc183b2c411b53154aecb4fbdaf335","last_reissued_at":"2026-07-05T05:17:54.980130Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:17:54.980130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.11553","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":"2026-07-05T05:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GTQ5eCRW+3445k7POF46Cg4gxGzEO2c4+C+FPmKTDjGRSZ4s7j8PSr9eWnuyiKlyx4iKdA8l/QXbxHt/O32NDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:51:14.790798Z"},"content_sha256":"65af86216690c1bbc47e78dd27fb7140754867f689950435f1f1223532c60e1a","schema_version":"1.0","event_id":"sha256:65af86216690c1bbc47e78dd27fb7140754867f689950435f1f1223532c60e1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:ZCBMC3SGJ62R7WFR3V5LII53WJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analytical Estimation of Beamforming Speed-of-Sound Using Transmission Geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV","eess.SP"],"primary_cat":"physics.med-ph","authors_text":"Can Deniz Bezek, Orcun Goksel","submitted_at":"2022-11-21T15:20:18Z","abstract_excerpt":"Most ultrasound imaging techniques necessitate the fundamental step of converting temporal signals received from transducer elements into a spatial echogenecity map. This beamforming (BF) step requires the knowledge of speed-of-sound (SoS) value in the imaged medium. An incorrect assumption of BF SoS leads to aberration artifacts, not only deteriorating the quality and resolution of conventional brightness mode (B-mode) images, hence limiting their clinical usability, but also impairing other ultrasound modalities such as elastography and spatial SoS reconstructions, which rely on faithfully b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.11553","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/2211.11553/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":"2026-07-05T05:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eTTYNoSBpS0UmtuVc+sq+fLjpRj23AGfuM7hd6upZT6UZIZFiejgPDniUQN05PVtcslLfgZxEqm5gRcTBEKkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:51:14.791325Z"},"content_sha256":"8652ee2ffb15e5c8dc20e2c31b93493ccc4949959fec2c58971139b65707b55d","schema_version":"1.0","event_id":"sha256:8652ee2ffb15e5c8dc20e2c31b93493ccc4949959fec2c58971139b65707b55d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/bundle.json","state_url":"https://pith.science/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/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":"2026-08-03T17:51:14Z","links":{"resolver":"https://pith.science/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ","bundle":"https://pith.science/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/bundle.json","state":"https://pith.science/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZCBMC3SGJ62R7WFR3V5LII53WJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:ZCBMC3SGJ62R7WFR3V5LII53WJ","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":"375f1b24c37a8869ec000c1a4912598d35a81d276a978f9908bfed50d2621081","cross_cats_sorted":["eess.IV","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-11-21T15:20:18Z","title_canon_sha256":"a6c8c4ece4ee9e84b5abf2b2aa1d02b029bef0511e9b33bf4ed459160d51bbe3"},"schema_version":"1.0","source":{"id":"2211.11553","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.11553","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"2211.11553v1","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.11553","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZCBMC3SGJ62R","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_16","alias_value":"ZCBMC3SGJ62R7WFR","created_at":"2026-07-05T05:17:54Z"},{"alias_kind":"pith_short_8","alias_value":"ZCBMC3SG","created_at":"2026-07-05T05:17:54Z"}],"graph_snapshots":[{"event_id":"sha256:8652ee2ffb15e5c8dc20e2c31b93493ccc4949959fec2c58971139b65707b55d","target":"graph","created_at":"2026-07-05T05:17:54Z","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/2211.11553/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Most ultrasound imaging techniques necessitate the fundamental step of converting temporal signals received from transducer elements into a spatial echogenecity map. This beamforming (BF) step requires the knowledge of speed-of-sound (SoS) value in the imaged medium. An incorrect assumption of BF SoS leads to aberration artifacts, not only deteriorating the quality and resolution of conventional brightness mode (B-mode) images, hence limiting their clinical usability, but also impairing other ultrasound modalities such as elastography and spatial SoS reconstructions, which rely on faithfully b","authors_text":"Can Deniz Bezek, Orcun Goksel","cross_cats":["eess.IV","eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-11-21T15:20:18Z","title":"Analytical Estimation of Beamforming Speed-of-Sound Using Transmission Geometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.11553","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":"sha256:65af86216690c1bbc47e78dd27fb7140754867f689950435f1f1223532c60e1a","target":"record","created_at":"2026-07-05T05:17:54Z","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":"375f1b24c37a8869ec000c1a4912598d35a81d276a978f9908bfed50d2621081","cross_cats_sorted":["eess.IV","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-11-21T15:20:18Z","title_canon_sha256":"a6c8c4ece4ee9e84b5abf2b2aa1d02b029bef0511e9b33bf4ed459160d51bbe3"},"schema_version":"1.0","source":{"id":"2211.11553","kind":"arxiv","version":1}},"canonical_sha256":"c882c16e464fb51fd8b1dd7ab423bbb26efc183b2c411b53154aecb4fbdaf335","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c882c16e464fb51fd8b1dd7ab423bbb26efc183b2c411b53154aecb4fbdaf335","first_computed_at":"2026-07-05T05:17:54.980130Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:17:54.980130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+D+uqoqH9lUQui9BtLBM3W0TFy6LlLgcAFIHkN3W1zFoT6O6JJCi1r7b9a8pH8kyGuJ1Qq5qUBQ7qe/acsCwDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:17:54.980522Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.11553","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65af86216690c1bbc47e78dd27fb7140754867f689950435f1f1223532c60e1a","sha256:8652ee2ffb15e5c8dc20e2c31b93493ccc4949959fec2c58971139b65707b55d"],"state_sha256":"3fed654f890997665a8e3861b09007df52ab44d1b47965b4829e3301794f58a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m/hSXOFDexnBWWvYYKY+6YTs8g9uNd4qEDmoDTI4VwlYNEcn/3jtim/KL4tQ8RpMoxXeZdkefQNX7Jn/JEEsBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:51:14.795878Z","bundle_sha256":"05b640b4dd945151831053f26a85904b65f1d658bfb2cebb1d8c103a5aee9b6f"}}